Science, New Series, Vol. 251, No. 4989, Jan. 4, 1991

Previous Issue: New Series, Vol. 250, No. 4988, Dec. 21, 1990
Next Issue: New Series, Vol. 251, No. 4990, Jan. 11, 1991

Front Matter (17 pp.)
New Year's Resolutions and Future Shock, p. 9

Daniel E. Koshland, Jr.

Letters

Carcinogens and Human Health: Part 2, pp. 10-13

David P. Rall; Bruce N. Ames; Lois S. Gold

Cold Spring Harbor, p. 13

John Cairns

Erratum: Biology Goes to the Movies, p. 13
Erratum: Broadly Neutralizing Antibodies Elicited by the Hypervariable Neutralizing Determinant of HIV-1, p. 13

News and Comment

NSF Centers Rise Above the Storm, pp. 19-22

Joseph Palca

Fight Over Data Disrupts Michigan State Project, pp. 23-24

Eliot Marshall

SSC Detectors: Yes, No, Maybe, p. 24

Robert Crease

Research Papers: Who's Uncited Now?, p. 25

David P. Hamilton

Leroy Hood Says No, p. 25

Leslie Roberts

Will Canada Build on Earlier TRIUMF?, p. 26

Douglas Powell

Briefings

Rehabilitation for Burt?, p. 27

Constance Holden

Science Money Woes in the U.S.S.R., p. 27

Constance Holden

NASA's Wish List, p. 27

Constance Holden

Research News

Making 3-D Movies of the Heart, pp. 28-30

Robert Pool

Cosmologists Begin to Fill in the Blanks, pp. 30-31

M. Mitchell Waldrop

On the Road to Mandelate...Racemase, pp. 31-32

Michelle Hoffman

Perspective

Mechanisms of Alternative Pre-mRNA Splicing, pp. 33-34

Tom Maniatis

Free Radicals Within the Antarctic Vortex: The Role of CFCs in Antarctic Ozone Loss, pp. 39-46

J. G. Anderson; D. W. Toohey; W. H. Brune

The Dynamics of the Stratospheric Polar Vortex and Its Relation to Springtime Ozone Depletions, pp. 46-52

Mark R. Schoeberl; Dennis L. Hartmann

Spot-Scan Imaging in Transmission Electron Microscopy, pp. 53-59

Kenneth H. Downing

Research Article

Atomic Structure of Ferredoxin-NADP$^ $ Reductase: Prototype for a Structurally Novel Flavoenzyme Family, pp. 60-66

P. Andrew Karplus; Mark J. Daniels; Jon R. Herriott

Reports

Observational Evidence for a Possible New Diffusion Path, pp. 67-70

Bradley R. Hacker; John M. Christie

Long-Term Human B Cell Lines Dependent on Interleukin-4 and Antibody to CD40, pp. 70-72

Jacques Banchereau; Paolo De Paoli; Alain Vallé; Eric Garcia; Françoise Rousset

Expression cDNA Cloning of the KGF Receptor by Creation of a Transforming Autocrine Loop, pp. 72-75

Toru Miki; Timothy P. Fleming; Donald P. Bottaro; Jeffrey S. Rubin; Dina Ron; Stuart A. Aaronson

Generation of Calcium Oscillations in Fibroblasts by Positive Feedback Between Calcium and IP₃, pp. 75-78

Alec T. Harootunian; Joseph P. Y. Kao; Suman Paranjape; Roger Y. Tsien

Glycosylphosphatidylinositol: A Candidate System for Interleukin-2 Signal Transduction, pp. 78-81

Diane D. Eardley; Marian Elliott Koshland

Whole Animal Cell Sorting of Drosophila Embryos, pp. 81-85

Mark A. Krasnow; Susan Cumberledge; Gerard Manning; Leonard A. Herzenberg; Garry P. Nolan

Inhibition of Morphine Tolerance and Dependence by the NMDA Receptor Antagonist MK-801, pp. 85-87

Keith A. Trujillo; Huda Akil

Critical Structural Elements of the VP16 Transcriptional Activation Domain, pp. 87-90

W. Douglas Cress; Steven J. Triezenberg

Three-Dimensional Structures of Acidic and Basic Fibroblast Growth Factors, pp. 90-93

X. Zhu; H. Komiya; A. Chirino; S. Faham; G. M. Fox; T. Arakawa; B. T. Hsu; D. C. Rees

Technical Comments

Model Simulation of Mid-Cretaceous Ocean Circulation, pp. 94-95

Karl B. Föllmi; M. Delamette; Eric J. Barron; William H. Peterson

Book Reviews

A Case for Listening, pp. 96-97

Making Connections. The Relational Worlds of Adolescent Girls at Emma Willard School.

Carol Gilligan; Nona P. Lyons; Trudy J. Hanmer

Review author[s]: Naomi Gerstel

Condensed Matter, pp. 97-98

The Superfluid Phases of Helium 3.

Dieter Vollhardt; Peter Wölfle

Review author[s]: Joseph W. Serene

Calamar, p. 98

Squid as Experimental Animals.

Daniel L. Gilbert; William J. Adelman, Jr.; John M. Arnold

Review author[s]: William F. Gilly

Books Received, p. 98

Back Matter (34 pp.)

Previous Issue: New Series, Vol. 250, No. 4988, Dec. 21, 1990
Next Issue: New Series, Vol. 251, No. 4990, Jan. 11, 1991

Science, New Series, Vol. 251, No. 4990, Jan. 11, 1991

Previous Issue: New Series, Vol. 251, No. 4989, Jan. 4, 1991
Next Issue: New Series, Vol. 251, No. 4991, Jan. 18, 1991

Front Matter (19 pp.)
Funding for Academic Research, p. 141

Philip H. Abelson

Letters

Hot Little Pond?, p. 142

Kenneth M. Towe

Royal Shorthand, p. 142

Stephen Jay Gould

Carcinogenesis Models, pp. 142-144

Lawrence J. Mordan; Suresh H. Moolgavkar; Samuel M. Cohen; Leon B. Ellwein

Asians and UCLA Admission, p. 144

Burton R. Clark

Erratum: Space Program: Blueprint for Ambiguity, p. 144
Erratum: Control of Yeast Mating Signal Transduction by a Mammalian β₂-Adrenergic Receptor and G_s a subunit, p. 144
Erratum: Inhibition of HIV-1 Replication by a Nonnucleoside Reverse Transcriptase Inhibitor, p. 144

News and Comment

NIH Misconduct Procedures Derailed, pp. 152-153

David P. Hamilton

Leon Lederman's Quest: Double Science Funding, pp. 153-154

Joseph Palca

Skeptics and Visionaries Examine Energy Saving, pp. 154-156

Jeremy Cherfas

Was Paul Biddle Too Tough on Stanford?, p. 157

Marcia Barinaga

Briefings

OSTP Fills Life Sciences Post, p. 158

Constance Holden

Poland Joins CERN, p. 158

Constance Holden

Ice Damage at SLAC, p. 158

Constance Holden

U.S. Drilling Takes New Track, p. 158

Constance Holden

Cell Bank for Mental Illnesses, p. 159

Constance Holden

Endangered Languages, p. 159

Constance Holden

Second Chance for "Earth Art", p. 159

Constance Holden

Women in NIH Research (Cont.), p. 159

Constance Holden

What When Down is Going Up, p. 159

Constance Holden

Correction: Now Even Mummies Go Digital, p. 159

Research News

Dinosaurs and Friends Snuffed Out?, pp. 160-162

Richard A. Kerr

Probing the Complex Genetics of Alcoholism, pp. 163-164

Constance Holden

The Breaking of a Mathematical Curse, p. 165

Barry A. Cipra

Black Holes Swarming at the Galactic Center?, p. 166

M. Mitchell Waldrop

Balance of Risks and Benefits in Preparation for Earthquakes, pp. 169-174

Bruce A. Bolt

Chemistry of Excited Electronic States, pp. 175-179

P. B. Armentrout

Reports

Venus Southern Hemisphere: Geologic Character and Age of Terrains in the Themis-Alpha-Lada Region, pp. 180-183

D. B. Campbell; D. A. Senske; J. W. Head; A. A. Hine; P. C. Fisher

Atomic-Resolution Electrochemistry with the Atomic Force Microscope: Copper Deposition on Gold, pp. 183-186

S. Manne; P. K. Hansma; J. Massie; V. B. Elings; A. A. Gewirth

Methylation-Sensitive Sequence-Specific DNA Binding by the c-Myc Basic Region, pp. 186-189

George C. Prendergast; Edward B. Ziff

Distinct Protein Targets for Signals Acting at the c-fos Serum Response Element, pp. 189-192

Regina Graham; Michael Gilman

Association of B Cell Antigen Receptor with Protein Tyrosine Kinase Lyn, pp. 192-194

Yuji Yamanashi; Terutaka Kakiuchi; Junichiro Mizuguchi; Tadashi Yamamoto; Kumao Toyoshima

Vaccination for Disease, pp. 195-198

Stephan Oehen; Hans Hengartner; Rolf M. Zinkernagel

Altered Synaptic Plasticity in Drosophila Memory Mutants with a Defective Cyclic AMP Cascade, pp. 198-201

Yi Zhong; Chun-Fang Wu

Coordinate Regulation of β-Lactamase Induction and Peptidoglycan Composition by the amp Operon, pp. 201-204

E. Tuomanen; S. Lindquist; S. Sande; M. Galleni; K. Light; D. Gage; S. Normark

Signal Transduction by Interferon-α Through Arachidonic Acid Metabolism, pp. 204-207

Gregory E. Hannigan; Bryan R. G. Williams

Book Reviews

The Vannevar Bush Legacy, p. 210

Science-The Endless Frontier. A Report to the President on a Program for Postwar Scientific Research.

Vannevar Bush

American Science Policy Since World War II.

Bruce L. R. Smith

Review author[s]: David A. Wilson

Working with Experts, pp. 210-211

The Fifth Branch. Science Advisers as Policymakers.

Sheila Jasanoff

Review author[s]: Susan Bartlett Foote

A System under Strain, pp. 211-213

Peerless Science. Peer Review and U.S. Science Policy.

Daryl E. Chubin; Edward J. Hackett

Review author[s]: Stuart S. Blume

Books Received, p. 213

Back Matter (27 pp.)

Previous Issue: New Series, Vol. 251, No. 4989, Jan. 4, 1991
Next Issue: New Series, Vol. 251, No. 4991, Jan. 18, 1991

Science, New Series, Vol. 251, No. 4991, Jan. 18, 1991

Previous Issue: New Series, Vol. 251, No. 4990, Jan. 11, 1991
Next Issue: New Series, Vol. 251, No. 4992, Jan. 25, 1991

Front Matter (20 pp.)
Teaching and Research, p. 249

Daniel E. Koshland, Jr.

Letters

Safety of Bovine Growth Hormone, pp. 256-257

David S. Kronfeld; Judith C. Juskevich; C. Greg Guyer

Interpreting Cancer Test, pp. 257-258

James D. Wilson; Gordon W. Gribble

Kidney Transplantation: Overlooked Pioneer, p. 258

Gertrude B. Elion

News and Comment

The Rush to Publish, pp. 260-263

Leslie Roberts

Third Strike for Idaho Reactor, p. 263

Mark Crawford

CDC Abandons Plan for AIDS Survey, p. 264

Joseph Palca

GAO and DOD Get into a Cat Fight, p. 265

Constance Holden

Science Literacy: The Enemy is Us, pp. 266-267

Robert Pool

Research News

New Light on Writing in the Americas, pp. 268-270

Virginia Morell

Montagnier Pursues the Mycoplasma-AIDS Link, p. 271

Michael Balter

Despite Reports of Its Death, the Big Bang Is Safe, pp. 272-273

M. Mitchell Waldrop

Global Temperature Hits Record Again, p. 274

Richard A. Kerr

Briefings

Radiation Research Shake-Up, p. 275

Constance Holden

U.K. Antes Up for Telescopes, p. 275

Constance Holden

George Mason to Set Up Think Tank, p. 275

Constance Holden

Private Initiative on Fetal Research, p. 275

Constance Holden

Subsistence Economy of El Paraíso, an Early Peruvian Site, pp. 277-283

Jeffrey Quilter; Bernardino Ojeda E.,; Deborah M. Pearsall; Daniel H. Sandweiss; John G. Jones; Elizabeth S. Wing

Chemistry and Biology of the Immunophilins and Their Immunosuppressive Ligands, pp. 283-287

Stuart L. Schreiber

Research Article

CCAAT-Enhancer Binding Protein: A Component of a Differentiation Switch, pp. 288-292

Robert M. Umek; Alan D. Friedman; Steven L. McKnight

Reports

An Antimony Sulfide with a Two-Dimensional, Intersecting System of Channels, pp. 293-294

John B. Parise

Local Structure and Chemical Shifts for Six-Coordinated Silicon in High-Pressure Mantel Phases, pp. 294-298

Jonathan F. Stebbins; Masami Kanzaki

Arctic Lakes and Streams as Gas Conduits to the Atmosphere: Implications for Tundra Carbon Budgets, pp. 298-301

George W. Kling; George W. Kipphut; Michael C. Miller

Putative Skeletal Neural Crest Cells in Early Late Ordovician Vertebrates from Colorado, pp. 301-303

Moya Meredith Smith

Altered Perception of Species-Specific Song by Female Birds After Lesions of a Forebrain Nucleus, pp. 303-305

Eliot A. Brenowitz

The Effect of Anti-Neoplastic Drugs on Murine Acquired Immunodeficiency Syndrome, pp. 305-308

Carole Simard; Paul Jolicoeur

Evidence for Biased Gene Conversion in Concerted Evolution of Ribosomal DNA, pp. 308-310

David M. Hillis; Craig Moritz; Calvin A. Porter; Robert J. Baker

The Effect of the Floor Plate on Pattern and Polarity in the Developing Central Nervous System, pp. 310-313

Shigeki Hirano; Shigeaki Fuse; G. S. Sohal

Regulation of Interleukin-2 Gene Enhancer Activity by the T Cell Accessory Molecule CD28, pp. 313-316

James D. Fraser; Bryan A. Irving; Gerald R. Crabtree; Arthur Weiss

Technical Comments

Microwave Sounding Units and Global Warming, pp. 316-317

Bruce L. Gary; Stephen J. Keihm; Roy W. Spencer; John R. Cristy

Lipid Flow in Locomoting Cells, pp. 317-318

Mark S. Bretscher; K. Jacobson; J. Lee; M. Gustafsson; K.-E. Magnusson

Bryozoan Morphological and Genetic Correspondence: What Does it Prove?, pp. 318-319

Jeffrey Levinton; Jeremy B. C. Jackson; Alan H. Cheetham

Book Reviews

Lives of the Mind, pp. 324-325

Authors of Their Own Lives. Intellectual Autobiographies of Twenty American Sociologists.

Bennett M. Berger

Review author[s]: Alan Sica

Other Landscapes, pp. 325-326

Australian Ecosystems. 200 Year of Utilization, Degration and Reconstruction.

D. A. Saunders; A. J. M. Hopkins; R. A. How

Review author[s]: Meg Lowman

Sleeping and Dreaming, pp. 326-327

Thalamic Oscillations and Signaling.

Mircea Steriade; Edward G. Jones; Rodolfo R. Llinas

Brainstem Control of Wakefulness and Sleep.

Mircea Steriade; Robert W. McCarley

Review author[s]: Christof Koch

Books Received, p. 327

Back Matter (21 pp.)

Previous Issue: New Series, Vol. 251, No. 4990, Jan. 11, 1991
Next Issue: New Series, Vol. 251, No. 4992, Jan. 25, 1991

Science, New Series, Vol. 251, No. 4992, Jan. 25, 1991

Previous Issue: New Series, Vol. 251, No. 4991, Jan. 18, 1991
Next Issue: New Series, Vol. 251, No. 4993, Feb. 1, 1991

Front Matter (30 pp.)
Future of the U.S. Space Program, p. 357

Philip H. Abelson

Letters

MRC Funding: No Freeze, p. 359

D. A. Rees

Testing Special Relativity, p. 359

J. David Jackson

Women and AIDS, pp. 359-362

Wendy Chavkin; Judith Cohen; Anke A. Ehrhardt; Mindy Thompson Fullilove; Dooley Worth; Jane Menken; Heather G. Miller; Charles F. Turner; Don C. Des Jarlais

"Citizen Friendly" Science, p. 362

Erratum: Inhibition of HIV-1 Replication by a Nonnucleoside Reverse Transcriptase Inhibitor, p. 362
Erratum: Diamond: Glittering Prize for Materials Science, p. 362
Erratum: Ice Nucleation by Alcohols Arranged in Monolayers at the Surface of Water Drops, p. 362

News and Comment

The Raging Bull of Berkeley, pp. 368-371

Paul Selvin

U.S. Backing for Fusion Project Seen, p. 371

Mark Crawford

High Noon in Utah, p. 371

Robert Pool

"Nuclear Winter" from Gulf War Discounted, p. 372

Eliot Marshall

Superconductivity Stars React to the Market, p. 373

Robert Pool

Conflict Over Release of Clinical Research Data, pp. 374-375

Joseph Palca

Hard Times for San Diego Museum, p. 375

Eliot Marshall

Briefings

Déjà Vu in NASA Reorganization, p. 376

David P. Hamilton

Sandage Wins Crafoord Prize, p. 376

David P. Hamilton

NASA's House Is Falling Down, p. 376

David P. Hamilton

Science Initiatives in the 1992 Budget, pp. 376-377

David P. Hamilton

Brown Picks Old Faces for a New Team, p. 377

David P. Hamilton

New T_c Record Fails to Materialize, p. 377

David P. Hamilton

Funding Unsexy Science, p. 377

David P. Hamilton

Research News

Looking for the Father of Us All, pp. 378+379-380

Ann Gibbons

Was Adam Very, Very Short?, p. 379

Alex Dorozynski

The Cosmic Eye of Rosat, pp. 380-381

M. Mitchell Waldrop

A Low-Iron Recipe for Deep-Mantle Rock, pp. 382-383

Richard A. Kerr

Perspective

Mitogenesis is Only One Factor in Carcinogenesis, pp. 387-388

I. Bernard Weinstein

Recent Trends in Fertility and Nuptiality in China, pp. 389-393

Ansley J. Coale; Wang Feng; Nancy E. Riley; Lin Fu De

Thermodynamics of Surface Morphology, pp. 393-400

Ellen D. Williams; N. C. Bartelt

Research Article

Visualizing the Higher Order Folding of a Catalytic RNA Molecule, pp. 401-407

Daniel W. Celander; Thomas R. Cech

Reports

The Spectrum of Comet Austin from 910 to 1180 Å, pp. 408-410

James C. Green; Webster Cash; Timothy A. Cook; S. Alan Stern

Phase Transition and Thermal Expansion of MgSiO₃ Perovskite, pp. 410-413

Yanbin Wang; Donald J. Weidner; Robert C. Liebermann; Xing Liu; Jaidong Ko; Michael T. Vaughan; Yusheng Zhao; Amir Yeganeh-Haeri; Rosemary E. G. Pacalo

Field-Based Evidence for Devolatilization in Subduction Zones: Implications for Arc Magmatism, pp. 413-416

Gray E. Bebout

Hydrodynamic Facilitation of Gregarious Settlement of a Reef-Building Tube Worm, pp. 421-424

Joseph R. Pawlik; Cheryl Ann Butman; Victoria R. Starczak

Participation of the TATA Factor in Transcription of the Yeast U6 Gene by RNA Polymerase C, pp. 424-426

Florence Margottin; Geneviève Dujardin; Matthieu Gérard; Jean-Marc Egly; Janine Huet; André Sentenac

A Genetic Model for Interaction of the Homeodomain Recognition Helix with DNA, pp. 426-430

Steven D. Hanes; Roger Brent

T Cell Receptor Peptide Therapy Triggers Autoregulation of Experimental Encephalomyelitis, pp. 430-432

Halina Offner; George A. Hashim; Arthur A. Vandenbark

Intrinsic Oscillations of Neocortex Generated by Layer 5 Pyramidal Neurons, pp. 432-435

Laurie R. Silva; Yael Amitai; Barry W. Connors

A Potent Nonpeptide Antagonist of the Substance P (NK₁) Receptor, pp. 435-437

R. Michael Snider; Jay W. Constantine; John A. Lowe III; Kelly P. Longo; Wesley S. Lebel; Heidi A. Woody; Susan E. Drozda; Manoj C. Desai; Frederic J. Vinick; Robin W. Spencer; Hans-Jürgen Hess

Activity and Distribution of Binding Sites in Brain of a Nonpeptide Substance P (NK₁) Receptor Antagonist, pp. 437-439

Stafford McLean; Alan H. Ganong; Thomas F. Seeger; Dianne K. Bryce; Kara G. Pratt; Linda S. Reynolds; Chester J. Siok; John A. Lowe III; James Heym

A Kinetic Partitioning Model of Selective Binding of Nonnative Proteins by the Bacterial Chaperone SecB, pp. 439-443

Simon J. S. Hardy; Linda L. Randall

Inside AAAS, pp. 450-451

Book Reviews

Achievements in Retrospect, pp. 455-456

Chandra. A Biography of S. Chandrasekhar.

Kameshwar C. Wali

Review author[s]: George Field

Cosmologists Queried, pp. 456-457

Origins. The Lives and Worlds of Modern Cosmologists.

Alan Lightman; Roberta Brawer

Review author[s]: David Layzer

West Orange Works, pp. 457-458

Edison and the Business of Innovation.

Andre Millard

Review author[s]: George Wise

Dividing Cells, pp. 458-459

Meiosis.

Bernard John

Review author[s]: Philip M. Meneely

Biophysics of Radiation, p. 459

Radiation Biophysics.

Edward L. Alpen

Review author[s]: Raymond E. Meyn

Books Received, p. 459

Back Matter (29 pp.)

Previous Issue: New Series, Vol. 251, No. 4991, Jan. 18, 1991
Next Issue: New Series, Vol. 251, No. 4993, Feb. 1, 1991

Science, New Series, Vol. 251, No. 4993, Feb. 1, 1991

Previous Issue: New Series, Vol. 251, No. 4992, Jan. 25, 1991
Next Issue: New Series, Vol. 251, No. 4994, Feb. 8, 1991

Front Matter (15 pp.)
War and Science, p. 497

Daniel E. Koshland, Jr.

Letters

Archeology and Looting: Preserving the Record, pp. 498-499

Christopher B. Donnan; W. M. Sudduth; Park Elliott Dietz; Richard E. W. Adams

Cold Fusion Results, p. 499

J. O'M. Bockris; Robert Pool

Units Unite!, pp. 499-500

James R. Pratt; Jeffrey J. Karpinski; Robert E. Davies; Robert K. Multer

Cystic Fibrosis Research, p. 500

Philip Gorden

ACT Questions, p. 500

Mark D. Reckase

Cool Heads, p. 500

Alan O. Ross

Erratum: New Light on Writing in the Americas, p. 500

Policy Forum

Paper Versus Polystyrene: A Complex Choice, pp. 504-505

Martin B. Hocking

ScienceScope, p. 507

News and Comment

NIH: The Price of Neglect, pp. 508-511

Rick Weiss

War With Iraq Spurs New Export Controls, pp. 512-514

Eliot Marshall

U.S. Bio-Defenses Faulted by GAO, p. 514

Eliot Marshall

Methanol-Powered Cars Get Ready to Hit the Road, pp. 514-515

Anne Simon Moffat

Briefings

Opening Window on Quantum Weirdness, p. 516

Constance Holden

Search for ETs Gets Fiscal Reprieve, p. 516

Constance Holden

Canada Sacrifices for Middle East, p. 516

Constance Holden

Buckyballs for Sale, p. 516

Constance Holden

Assessing High School Achievement, pp. 516-517

Constance Holden

Final Word on Agent Orange?, p. 517

Constance Holden

New Audit at Stanford, p. 517

Constance Holden

The Case Against Crop Chemicals, p. 517

Constance Holden

Research News

Is NIH Failing an AIDS "Challenge"?, pp. 518-520

Jon Cohen

Molecular Scissors: RNA Enzymes Go Commercial, p. 521

Ann Gibbons

Slowly, Hubble Begins to Do Science, pp. 522-523

M. Mitchell Waldrop

Population Aging Policies in East Asia and the United States, pp. 527-531

Linda G. Martin

Ultrafast X-Ray Pulses from Laser-Produced Plasmas, pp. 531-536

Margaret M. Murnane; Henry C. Kapteyn; Mordecai D. Rosen; Roger W. Falcone

Shedding Light on Baryonic Dark Matter, pp. 537-541

Joseph Silk

Reports

Identification of the ¹H-NMR Spectra of Complex Oligosaccharides with Artificial Neural Networks, pp. 542-544

Bernd Meyer; Torben Hansen; Donald Nute; Peter Albersheim; Alan Darvill; William York; Jeffery Sellers

Rapid Changes in the Range Limits of Scots Pine 4000 Years Ago, pp. 544-547

Annabel J. Gear; Brian Huntley

Deuterium on Venus: Observations from Earth, pp. 547-549

Catherine de Bergh; Bruno Bézard; Tobias Owen; David Crisp; Jean-Pierre Maillard; Barry L. Lutz

An Interplanetary Dust Particle Linked Directly to Type CM Meteorites and an Asteroidal Origin, pp. 549-552

J. P. Bradley; D. E. Brownlee

A New Method for Carbon Isotopic Analysis of Protein, pp. 552-554

D. E. Nelson

Cystic Fibrosis Transmembrane Conductance Regulator: Nucleotide Binding to a Synthetic Peptide, pp. 555-557

Philip J. Thomas; P. Shenbagamurthi; Xavier Ysern; Peter L. Pedersen

Transducin Activation by Rhodopsin Without a Covalent Bond to the 11-Cis-Retinal Chromophore, pp. 558-560

Eugene A. Zhukovsky; Phyllis R. Robinson; Daniel D. Oprian

Inhalational Anesthetics Stereochemistry: Optical Resolution of Halothane, Enflurane, and Isoflurane, pp. 560-561

J. Meinwald; W. R. Thompson; D. L. Pearson; W. A. König; T. Runge; W. Francke

Regulation of the Apolipoprotein AI Gene by ARP-1, a Novel Member of the Steroid Receptor Superfamily, pp. 561-565

John A. A. Ladias; Sotirios K. Karathanasis

Cortical Computational Maps Control Auditory Perception, pp. 565-568

Hiroshi Riquimaroux; Stephen J. Gaioni; Nobuo Suga

ACh Receptor-Rich Membrane Domains Organized in Fibroblasts by Recombinant 43-Kildalton Protein, pp. 568-570

William D. Phillips; Carrie Kopta; Paul Blount; Paul D. Gardner; Joe Henry Steinbach; John Paul Merlie

Protein Kinase C and Regulation of the Local Competence of Xenopus Ectoderm, pp. 570-573

Arie P. Otte; IJsbrand M. Kramer; Anthony J. Durston

Book Reviews

Thinking Like a Vervet, pp. 574-575

How Monkeys See the World. Inside the Mind of Another Species.

Dorothy L. Cheney; Robert M. Seyfarth

Review author[s]: Alison Jolly

Cognition as Search, p. 575

Unified Theories of Cognition.

Allen Newell

Review author[s]: Jerome A. Feldman

Left Brain, Right Brain, pp. 575-576

The Decline and Fall of Hemispheric Specialization.

Robert Efron

Review author[s]: Michael C. Corballis

The Bottom of the Sea, pp. 576-577

The Deep Sea Bed. Its Physics, Chemistry and Biology.

N. Charnock; J. M. Edmond; I. N. McCave; A. L. Rice; T. R. S. Wilson

Review author[s]: Craig R. Smith

Orrery of Orreries, p. 577

The Milky Way as a Galaxy.

Gerald Gilmore; Ivan R. King; Pieter C. van der Kruit; Roland Buser; Ivan R. King

Review author[s]: François Schweizer

Books Received, pp. 577-578

Back Matter (18 pp.)

Previous Issue: New Series, Vol. 251, No. 4992, Jan. 25, 1991
Next Issue: New Series, Vol. 251, No. 4994, Feb. 8, 1991

Science, New Series, Vol. 251, No. 4994, Feb. 8, 1991

Previous Issue: New Series, Vol. 251, No. 4993, Feb. 1, 1991
Next Issue: New Series, Vol. 251, No. 4995, Feb. 15, 1991

Front Matter (15 pp.)
Federal Impediments to Scientific Research, p. 605

Philip H. Abelson

Letters

Saving Science Education, p. 606

Jacob Rabinow

Biology Textbooks, p. 606

Joseph D. McInerney

Carcinogens and Human Health: Part 3, pp. 606-608

Vincent James Cogliano; William H. Farland; Peter W. Preuss; Jeanette A. Wiltse; Lorenz R. Rhomberg; Chao W. Chen; Marc J. Mass; Stephen Nosnow; Paul D. White; Jean C. Parker; Suzanne M. Wuerthele; Bruce N. Ames; Lois Swirsky Gold

Erratum: "Was Paul Biddle Too Tough on Stanford?", p. 608
Erratum: Carcinogens and Human Health: Part 1, p. 608
Erratum: Carcinogens and Human Health: Part 2, p. 608
ScienceScope, p. 615

David P. Hamilton

News and Comment

Science Budget: Growth Amid Red Ink, pp. 616-618

Colin Norman

Is UK HIV Strain Really LAV?, p. 619

Jeremy Cherfas

Pinning Down Gallo's Virus, p. 619

C. N.

East Meets West to Look for Toxic Waste Sites, pp. 620-621

Andrea Cezeaux

Cooling the Greenhouse Cheaply, p. 621

Richard A. Kerr

Briefings

Politics in the Classroom (cont.), p. 622

Constance Holden

New Round in Purloined Data Case, p. 622

Constance Holden

Eternal Obfuscation..., p. 622

Constance Holden

Facilities Awards, p. 622

Constance Holden

Physicists Walk Planck-and Survive, p. 623

Constance Holden

No Tech Fix for Auto Population Bomb, p. 623

Constance Holden

Canadian Statistics, p. 623

Constance Holden

Genetics "Force de Frappe", p. 623

Constance Holden

Muscular Dystrophy Findings, p. 623

Constance Holden

New NEJM Editor, p. 623

Constance Holden

Research News

Dioxin Risks Revisited, pp. 624-626

Leslie Roberts

Did Turing Discover How the Leopard Got Its Spots?, p. 627

Robert Pool

Mathematics-Amid War-in San Francisco, pp. 628-629

Barry Cipra

New Hope for Vaccine Against Schistosomiasis, pp. 630-631

Jeremy Cherfas

Perspective

Nucleation of Population and Water Storage Among the Ancient Maya, p. 632

R. E. W. Adams

Mesoscopic Conductors and Correlations in Laser Speckle Patterns, pp. 633-639

Shechao Feng; Patrick A. Lee

Graphite: A Mimic for DNA and Other Biomolecules in Scanning Tunneling Microscope Studies, pp. 640-642

Carol R. Clemmer; Thomas P. Beebe, Jr.

Research Article

Sequence-Specific Antirepression of Histone H1-Mediated Inhibition of Basal RNA Polymerase II Transcription, pp. 643-649

Glenn E. Croston; Leslie A. Kerrigan; Lucy M. Lira; Daniel R. Marshak; James T. Kadonaga

Reports

Modeling of Turing Structures in the Chlorite-Iodide-Malonic Acid-Starch Reaction System, pp. 650-652

István Lengyel; Irving R. Epstein

Potassium in Clinopyroxene Inclusions from Diamonds, pp. 652-655

George E. Harlow; David R. Veblen

The Search for Evidence of Large Prehistoric Earthquakes Along the Atlantic Seaboard, pp. 655-658

David Amick; Robert Gelinas

A Water Storage Adaptation in the Maya Lowlands, pp. 658-662

Vernon L. Scarborough; Gary G. Gallopin

Large Protein-Induced Dipoles for a Symmetric Carotenoid in a Photosynthetic Antenna Complex, pp. 662-665

David S. Gottfried; Martin A. Steffen; Steven G. Boxer

Fibroblast Growth Factor Receptors from Liver Vary in Three Structural Domains, pp. 665-668

Jinzhao Hou; Mikio Kan; Kerstin McKeehan; George McBride; Pamela Adams; Wallace L. McKeehan

Inability of Malaria Vaccine to Induce Antibodies to a Protective Epitope Within Its Sequence, pp. 668-671

Yupin Charoenvit; William E. Collins; Trevor R. Jones; Pascal Millet; Leo Yuan; Gary H. Campbell; Richard L. Beaudoin; J. Roger Broderson; Stephen L. Hoffman

Ability of the c-mos Product to Associate with and Phosphorylate Tubulin, pp. 671-675

Renping Zhou; Marianne Oskarsson; Richard S. Paules; Nicholas Schulz; Don Cleveland; George F. Vande Woude

A68: A Major Subunit of Paired Helical Filaments and Derivatized Forms of Normal Tau, pp. 675-678

Virginia M.-Y. Lee; Brian J. Balin; Laszlo Otvos, Jr.; John Q. Trojanowski

Generation of cAMP-Activated Chloride Currents by Expression of CFTR, pp. 679-682

Matthew P. Anderson; Devra P. Rich; Richard J. Gregory; Alan E. Smith; Michael J. Welsh

Book Reviews

Modes of Leadership, p. 684

Contrasts in Scientific Style. Research Groups in the Chemical and Biochemical Sciences.

Joseph S. Fruton

Review author[s]: W. H. Brock

The Lesser-Known Bohr, pp. 684-685

Redirecting Science. Niels Bohr, Philanthropy, and the Rise of Nuclear Physics.

Finn Aaserud

Review author[s]: Viktor F. Wfisskopf

The High-Latitude Oceans, pp. 685-686

Polar Oceanography. Part A, Physical Science.

Walker O. Smith, Jr.

Review author[s]: John E. Walsh

Trophic Topology, pp. 686-687

Community Food Webs. Data and Theory.

Joel E. Cohen; Frédéric Briand; Charles M. Newman; Zbigniew J. Palka

Review author[s]: John H. Steele

Books Received, p. 687

Back Matter (25 pp.)

Previous Issue: New Series, Vol. 251, No. 4993, Feb. 1, 1991
Next Issue: New Series, Vol. 251, No. 4995, Feb. 15, 1991

Science, New Series, Vol. 251, No. 4995, Feb. 15, 1991

Previous Issue: New Series, Vol. 251, No. 4994, Feb. 8, 1991
Next Issue: New Series, Vol. 251, No. 4996, Feb. 22, 1991

Front Matter (21 pp.)
The Saving of Yosemite, p. 721

Daniel E. Koshland, Jr.

Letters

Virus Hunting and the Scientific Method, p. 724

Peter Duesberg

Radon Risk and EPA, pp. 724-726

Richard J. Guimond; Henry Hurwitz, Jr.; Dade W. Moeller; Bernard L. Cohen

Ubiquitous Neuroscientists, p. 726

John T. Durkin

Erratum: ACh Receptor-Rich Membrane Domains Organized in Fibroblasts by Recombinant 43-Kildalton Protein, p. 726
ScienceScope, p. 733

David P. Hamilton

News and Comment

John Dingell Takes on Stanford, pp. 734-737

Marcia Barinaga

It Ain't Broke, But Why Not FCCSET?, pp. 737-738

Joseph Palca

Creationist School Lives On, p. 738

Yvonne Baskin

Biotech Nightmare: Does Cetus Own PCR?, pp. 739-740

Marcia Barinaga

British Science Under the Ax-Again, p. 740

Jeremy Cherfas

The SSC Gets Its (Official) Price Tag: $8.3 Billion, p. 741

David P. Hamilton

Briefings

Right Handers Live Longer, p. 742

Constance Holden

Smooth Ride for Nominee, p. 742

Constance Holden

Juggling Robot, p. 742

Constance Holden

New Genome Centers, pp. 742+743

Constance Holden

Social Scientists Get a Man at OSTP... and an NSF Directorate?, pp. 742-743

Constance Holden

Log On, Ye Clinicians, p. 743

Constance Holden

Biotech Directory, p. 743

Constance Holden

Research News

Biologists Turn on to "Off-Enzymes", pp. 744-746

Jean Marx

Did a Burst of Volcanism Overheat Ancient Earth?, pp. 746-747

Richard A. Kerr

New Center To Study Therapies and Ethnicity, p. 748

Constance Holden

Perspective

Retroposons-Seeds of Evolution, p. 753

Jürgen Brosius

Exact Solution of Large Asymmetric Traveling Salesman Problems, pp. 754-761

Donald L. Miller; Joseph F. Pekny

The myoD Gene Family: Nodal Point During Specification of the Muscle Cell Lineage, pp. 761-766

Harold Weintraub; Robert Davis; Stephen Tapscott; Matthew Thayer; Michael Krause; Robert Benezra; T. Keith Blackwell; David Turner; Ralph Rupp; Stanley Hollenberg; Yuan Zhuang; Andrew Lassar

Research Article

Light-Directed, Spatially Addressable Parallel Chemical Synthesis, pp. 767-773

Stephen P. A. Fodor; J. Leighton Read; Michael C. Pirrung; Lubert Stryer; Amy Tsai Lu; Dennis Solas

Reports

Detection of CN Emission from (2060) Chiron, pp. 774-777

Schelte J. Bus; Michael F. A'Hearn; David G. Schleicher; Edward Bowell

Constraints on the Diameter and Albedo of 2060 Chiron, pp. 777-780

Mark V. Sykes; Russell G. Walker

A-Axis-Oriented YBa₂Cu₃O₇/PrBa₂Cu₃O₇ Superlattices, pp. 780-783

C. B. Eom; A. F. Marshall; J.-M. Triscone; B. Wilkens; S. S. Laderman; T. H. Geballe

Determination of Membrane Protein Structure by Rotational Resonance NMR: Bacteriorhodopsin, pp. 783-786

F. Creuzet; A. McDermott; R. Gebhard; K. Van Der Hoef; M. B. Spijker-Assink; J. Herzfeld; J. Lugtenburg; M. H. Levitt; R. G. Griffin

Baddeleyite-Type High-Pressure Phase of TiO₂, pp. 786-788

H. Sato; S. Endo; M. Sugiyama; T. Kikegawa; O. Shimomura; K. Kusaba

Endothelial Expression of a Mononuclear Leukocyte Adhesion Molecule During Atherogenesis, pp. 788-791

Myron I. Cybulsky; Michael A. Gimbrone, Jr.

Human Immunodeficiency Virus Infection of Human-PBL-SCID Mice, pp. 791-794

Donald E. Mosier; Richard J. Gulizia; Stephen M. Baird; Darcy B. Wilson; Deborah H. Spector; Stephen A. Spector

The Assimilation of Elements Ingested by Marine Copepods, pp. 794-796

John R. Reinfelder; Nicholas S. Fisher

Senescence of Nickel-Transformed Cells by an X Chromosome: Possible Epigenetic Control, pp. 796-799

Catherine B. Klein; Kathleen Conway; Xin Wei Wang; Rupinder K. Bharma; Xinhua Lin; Mitchell D. Cohen; Lois Annab; J. Carl Barrett; Max Costa

Effect of Cytochrome P450 Arachidonate Metabolites on Ion Transport in Rabbit Kidney Loop of Henle, pp. 799-802

Bruno Escalante; David Erlij; John R. Falck; John C. McGiff

Identification of the Hepatocyte Growth Factor Receptor as the c-met Proto-Oncogene Product, pp. 802-804

Donald P. Bottaro; Jeffrey S. Rubin; Donna L. Faletto; Andrew M.-L. Chan; Thomas E. Kmiecik; George F. Vande Woude; Stuart A. Aaronson

Regulation of Polyphosphoinositide-Specific Phospholipase C Activity by Purified G_q, pp. 804-807

Alan V. Smrcka; John R. Hepler; Kendall O. Brown; Paul C. Sternweis

Translational Potentiation of Messenger RNA with Secondary Structure in Xenopus, pp. 807-810

Loning Fu; Ruiqiong Ye; Leon W. Browder; Randal N. Johnston

Technical Comment

Conserved Sequence and Structural Elements in the HIV-1 Principal Neutralizing Determinant: Corrections and Clarifications, p. 811

Gregory J. LaRosa; Joseph P. Davide; Kent Weinhold; Julie A. Waterbury; Albert T. Profy; John A. Lewis; Alphonse J. Langlois; Gordon R. Dreesman; R. Neal Boswell; Philip Shadduck; L. Howard Holley; Martin Karplus; Dani P. Bolognesi; Thomas J. Matthews; Emilio A. Emini; Scott D. Putney

Book Reviews

The Continuing Question of Animal Awareness, pp. 813-814

Cognitive Ethology. The Minds of Other Animals. Essays in Honor of Donald R. Griffin

Carolyn A. Ristau

Review author[s]: Charles T. Snowdo

The Dinosaurs of '47, p. 814

The Age of Reptiles. The Great Dinosaur Mural at Yale.

Vincent Scully; Rudolph F. Zalinger; Leo J. Hickey; John H. Ostrom

Review author[s]: Dale A. Russell

A Puritan of Science, p. 815

Science and Cultural Crisis. An Intellectual Biography of Percy Williams Bridgman (1882-1961).

Maila L. Walter

Review author[s]: Albert E. Moyer

Medical Assessment, pp. 815-816

Effective Care in Pregnancy and Childbirth

Iain Chalmers; Murray Enkin; Mark J. N. C. Keirse

A Guide to Effective Care in Pregnancy and Childbirth.

Murray Enkin; Marc J. N. C. Keirse; Iain Chalmers

Review author[s]: Michael S. Kramer

Books Received, pp. 816-817

Back Matter (27 pp.)

Previous Issue: New Series, Vol. 251, No. 4994, Feb. 8, 1991
Next Issue: New Series, Vol. 251, No. 4996, Feb. 22, 1991

Science, New Series, Vol. 251, No. 4996, Feb. 22, 1991

Previous Issue: New Series, Vol. 251, No. 4995, Feb. 15, 1991
Next Issue: New Series, Vol. 251, No. 4997, Mar. 1, 1991

Front Matter (25 pp.)
Polymers, p. 853

John I. Brauman

Letters

Views of the Genome Project, pp. 854-855

Donald D. Brown; Michael Syvanen

Aging Studies, p. 855

Joseph Meites

Adaptive Optics, pp. 855-856

P. Léna

Correction: Comparison of Two Forms of Long-Term Potentiation in Single Hippocampus Neurons, p. 856
Erratum: Toward Protein Tertiary Structure Recognition by Means of Associative Memory Hamiltonians, p. 856
Erratum: Ostwald Ripening of Clays and Metamorphic Minerals, p. 856
Erratum: Peptide Immunogen Mimicry of a Protein-Specific Structural Epitope on Human Choriogonadotropin, p. 856
ScienceScope, p. 863

News and Comment

The Geopolitics of Nuclear Waste, pp. 864-866+867

Eliot Marshall

Flap Erupts Over Dioxin Meeting, pp. 866-867

Leslie Roberts

U.S. Bites Greenhouse Bullet and Gags, p. 868

Richard A. Kerr

AAAS Meeting Opens with Views from the Top, p. 869

Joseph Palca

Briefings

World Bank Environment Fund, p. 870

Constance Holden

Proving Einstein Right (or Wrong), p. 870

Constance Holden

Cruising the Digital Highway, p. 870

Constance Holden

Looking for Planets, pp. 870-871

Constance Holden

Campus Drinking, p. 871

Constance Holden

Physicists Hurting, p. 871

Constance Holden

Public Attitudes Toward Gene Splicing, p. 871

Constance Holden

PMA Launches Ad Campaign, p. 871

Constance Holden

How to Win a Westinghouse, p. 871

Constance Holden

Research News

Systematics Goes Molecular, pp. 872-874

Ann Gibbons

Plastics Get Oriented-And Get New Properties, pp. 874-876

Faye Flam

Mutation Identified as a Possible Cause of Alzheimer's Desease, pp. 876-877

Jean Marx

Transgenic Crops Get a Test in the Wild, p. 878

Jeremy Cherfas

Polymers

Living Polymerization Methods, pp. 887-893

Owen W. Webster

DNA: A Model Compound for Solution Studies of Macromolecules, pp. 893-898

R. Pecora

Polymer-Polymer Phase Behavior, pp. 898-905

Frank S. Bates

Polymer Brushes, pp. 905-914

S. T. Milner

Research Article

Recoverin: A Calcium Sensitive Activator of Retinal Rod Guanylate Cyclase, pp. 915-918

Alexander M. Dizhoor; Sanghamitra Ray; Santosh Kumar; Greg Niemi; Maribeth Spencer; Doane Brolley; Kenneth A. Walsh; Paul P. Philipov; James B. Hurley; Lubert Stryer

Reports

Free Energy and Temperature Dependence of Electron Transfer at the Metal-Electrolyte Interface, pp. 919-922

Christopher E. D. Chidsey

Charge Separation in a Reaction Center Incorporating Bacteriochlorophyll for Photoactive Bacteriopheophytin, pp. 922-927

Christine Kirmaier; Dale Gaul; Randy DeBey; Dewey Holten; Craig C. Schenck

Chemical Sensors Based on Controlled-Release Polymer Systems, pp. 927-929

Steven M. Barnard; David R. Walt

High Winds of Neptune: A Possible Mechanism, pp. 929-932

V. E. Suomi; S. S. Limaye; D. R. Johnson

Nylon Production: An Unknown Source of Atmospheric Nitrous Oxide, pp. 932-934

Mark H. Thiemens; William C. Trogler

Distinctive Cranial and Cervical Innervation of Wing Muscles: New Evidence for Bat Monophyly, pp. 934-936

J. G. M. Thewissen; S. K. Babcock

A Heparin-Binding Growth Factor Secreted by Macrophage-Like Cells that is Related to EGF, pp. 936-939

Shigeki Higashiyama; Judith A. Abraham; Judy Miller; John C. Fiddes; Michael Klagsburn

Mutations Affecting Internal TEA Blockade Identify the Probable Pore-Forming Region of a K⁺ Channel, pp. 939-942

Gary Yellen; Mark E. Jurman; Tatiana Abramson; Roderick MacKinnon

Exchange of Conduction Pathways Between Two Related K⁺ Channels, pp. 942-944

Hali A. Hartmann; Glenn E. Kirsch; John A. Drewe; Maurizio Taglialatela; Rolf H. Joho; Arthur M. Brown

Reshaping the Cortical Motor Map by Unmasking Latent Intracortical Connections, pp. 944-947

Kimberle M. Jacobs; John P. Donoghue

D1 Dopamine Receptors in Prefrontal Cortex: Involvement in Working Memory, pp. 947-950

Toshiyuki Sawaguchi; Patricia S. Goldman-Rakic

Technical Comment

Form, Motion, and Binocular Rivalry, pp. 950-951

V. S. Ramachandran

Inside AAAS, pp. 952-953

Book Reviews

The Boosting of the Planets, p. 957

Space Technology and Planetary Astronomy.

Joseph N. Tatarewicz

Review author[s]: Richard Hirsh

Institutional Arrangements, pp. 957-958

The Kaiser's Chemists. Science and Modernization in Imperial Germany.

Jeffrey Allan Johnson

Review author[s]: Edmund N. Todd

Books Received, p. 958

Back Matter (34 pp.)

Previous Issue: New Series, Vol. 251, No. 4995, Feb. 15, 1991
Next Issue: New Series, Vol. 251, No. 4997, Mar. 1, 1991

Science, New Series, Vol. 251, No. 4997, Mar. 1, 1991

Previous Issue: New Series, Vol. 251, No. 4996, Feb. 22, 1991
Next Issue: New Series, Vol. 251, No. 4998, Mar. 8, 1991

Front Matter (42 pp.)
Gordon Research Conferences, p. 1001

Richard S. Nicholson

Policy Forum

U.S. Water Resources Versus an Announced But Uncertain Climate Change, p. 1002

Paul E. Waggoner

Letters

Cool Policy, p. 1005

Jonathan David Cool

Explaining the Avocado Illusion, p. 1005

Maurice Hershenson

High-Temperature Superconductivity Theory, pp. 1005-1007

Robert Schrieffer; P. W. Anderson; E. Abrahams; R. Laughlin; Frank Wilczek

Erratum: Exact Solution of Large Asymmetric Traveling Salesman Problems, p. 1007
Erratum: Viral Etiology of AIDS and the Gallo Probe, p. 1007
ScienceScope, p. 1011

David P. Hamilton

News and Comment

Guidance from Above in the Gulf War, pp. 1012-1014

Vincent Kiernan

Caltech Deals With Fraud Allegations, p. 1014

Leslie Roberts

Down to the Bone: East German Science Gets Cut, pp. 1015-1016

Richard Sietmann

Researchers Protest User Fees at National Labs, p. 1016

Mark Crawford

Do We Need More Ph.D.s, or Is Fewer Really Better?, pp. 1017-1018

Constance Holden

Europeans Push Computer Plan, p. 1018

Jeremy Cherfas

Briefings

Gene Therapy: A New First?, p. 1019

David P. Hamilton

Indoor Radon: A Little Less to Worry About, p. 1019

David P. Hamilton

Practicing What You Preach at Budget Time, p. 1019

David P. Hamilton

Heart Attacks More Severe for Women, p. 1019

David P. Hamilton

British Brains Continuing to Drain, p. 1019

David P. Hamilton

Capital Science: AAAS Meets in Washington, pp. 1020-1025

Ann Gibbons; Marcia Barinaga; Eliot Marshall; M. Mitchell Waldrop; Jean Marx; Robert Langreth; J. B.

Research News

Magellan Paints a Portrait of Venus, pp. 1026-1027

Richard A. Kerr

Music of the Spheres, p. 1028

Barry Cipra

The Evolution of Sex Chromosomes, pp. 1030-1033

Brian Charlesworth

Physics in Strong Magnetic Fields Near Neutron Stars, pp. 1033-1038

Alice K. Harding

Molecular Analysis of Protein Assembly in Muscle Development, pp. 1039-1044

Henry F. Epstein; Donald A. Fischman

Research Article

Control of Alternative Splicing by the Differential Binding of U1 Small Nuclear Ribonucleoprotein Particle, pp. 1045-1050

Hai-Chien Kuo; Faiz-ul H. Nasim; Paula J. Grabowski

Reports

Direct Observation of Global Protein Motion in Hemoglobin and Myoglobin on Picosecond Time Scales, pp. 1051-1054

L. Genberg; L. Richard; G. McLendon; R. J. Dwayne Miller

Reduction of Deepwater Formation in the Greenland Sea During the 1980s: Evidence from Tracer Data, pp. 1054-1056

Peter Schlosser; Gerhard Bönisch; Monika Rhein; Reinhold Bayer

Evidence for a Phytotoxic Hydroxy-Aluminum Polymer in Organic Soil Horizons, pp. 1056-1058

Douglas Hunter; Donald S. Ross

The Greenhouse Effect in Central North America: If Not Now, When?, pp. 1058-1061

Thomas R. Karl; Richard R. Heim, Jr.; Robert G. Quayle

Evidence of Strong Earthquake Shaking in the Lower Wabash Valley from Prehistoric Liquefaction Features, pp. 1061-1063

S. F. Obermeier; N. R. Bleuer; C. A. Munson; P. J. Munson; W. S. Martin; K. M. McWilliams; D. A. Tabaczynski; J. K. Odum; M. Rubin; D. L. Eggert

New Fossil Evidence on the Sister-Group of Mammals and Early Mesozoic Faunal Distributions, pp. 1063-1065

Neil H. Shubin; A. W. Crompton; Hans-Dieter Sues; Paul E. Olsen

Salicornia bigelovii Torr.: An Oilseed Halophyte for Seawater Irrigation, pp. 1065-1067

Edward P. Glenn; James W. O'Leary; M. Carolyn Watson; T. Lewis Thompson; Robert O. Kuehl

Characterization of a Dimerization Motif in AP-2 and Its Function in Heterologous DNA-Binding Proteins, pp. 1067-1071

Trevor Williams; Robert Tijan

Molecular Nature of the Drosophila Sex Determination Signal and Its Link to Neurogenesis, pp. 1071-1074

James W. Erickson; Thomas W. Cline

Enhancement of HIV-1 Cytocidal Effects in CD4⁺ Lymphocytes by the AIDS-Associated Mycoplasma, pp. 1074-1076

Shyh-Ching Lo; Shien Tsai; Janet R. Benish; James Wai-Kuo Shih; Douglas J. Wear; Dennis M. Wong

A Model for the Adjustment of the Mitotic Clock by Cyclin and MPF Levels, pp. 1076-1078

R. Norel; Z. Agur

Cell Cycle-Dependent Coupling of the Calcitonin Receptor to Different G Proteins, pp. 1078-1082

Munmun Chakraborty; Diptendu Chatterjee; Sakari Kellokumpu; Howard Rasmussen; Roland Baron

Molecular Transfer of a Species-Specific Behavior from Drosophila simulans to Drosophila melanogaster, pp. 1082-1085

David A. Wheeler; Charalambos P. Kyriacou; Mary L. Greenacre; Qiang Yu; Joan E. Rutila; Michael Rosbash; Jeffrey C. Hall

Book Reviews

Risk Abatement, p. 1114

Setting Safety Standards. Regulation in the Public and Private Sectors.

Ross E. Cheit

Review author[s]: Susan G. Hadden

Quest for a Particle, p. 1115

The Higgs Hunter's Guide.

John F. Gunion; Howard E. Haber; Gordon Kane; Sally Dawson

Review author[s]: Roberto Peccei

Embryogenesis, pp. 1115-1116

This Side Up. Spatial Determination in the Early Development of Animals.

Robert Wall

Review author[s]: William R. Jeffery

Archeology in Context, pp. 1116-1117

A History of Archaeological Thought.

Bruce G. Trigger

Review author[s]: Jacob W. Gruber

Books Received, pp. 1117-1118

Back Matter (30 pp.)

Previous Issue: New Series, Vol. 251, No. 4996, Feb. 22, 1991
Next Issue: New Series, Vol. 251, No. 4998, Mar. 8, 1991

Science, New Series, Vol. 251, No. 4998, Mar. 8, 1991

Previous Issue: New Series, Vol. 251, No. 4997, Mar. 1, 1991
Next Issue: New Series, Vol. 251, No. 4999, Mar. 15, 1991

Front Matter (19 pp.)
Science Puts Its Best Foot Forward, p. 1157

Daniel E. Koshland, Jr.

Policy Forum

Curing the Orphan Drug Act, pp. 1158-1159

Jess G. Thoene

Letters

Effectiveness of AIDS Vaccines, p. 1161

Albert B. Sabin

"Sequence-Gazing?", pp. 1161-1162

Jon Beckwith; Mark A. Poritz; Harris D. Bernstein; Peter Walter

Unus et Triginta Quoque Anno?, p. 1162

Garrett Hardin

Steroid Therapy Publication Delay, p. 1162

Paul Meier

Buckyballs and Double Bonds, p. 1162

Harold Hart

GABAergic Pathway from Zona Incerta to Neocortex: Clarification, p. 1162

Chia-Sheng Lin; Miguel A. L. Nicolelis; Jay S. Schneider; John K. Chapin, Jr.

Erratum: "Nuclear Winter" from Gulf War Discounted, p. 1162
ScienceScope, p. 1167

David P. Hamilton

News and Comment

Verdict in Sight in the "Baltimore Case", pp. 1168-1172

David P. Hamilton

Putting AIDS Research in Perspective, p. 1172

Joseph Palca

Early Detection Nips Math Problems in the Bud, pp. 1173-1174

Anne Simon Moffat

And the Winner: Cetus Does Own PCR, p. 1174

Marcia Barinaga

Kuwait's Unjust Deserts: Damage to Its Desert, p. 1175

Constance Holden

Research News

Dimers Direct Development, pp. 1176-1177

Marcia Barinaga

The Florida Panther Verges on Extinction, pp. 1178-1180

Chuck Fergus

New Clue Found to Growth Factor Action, p. 1181

Michelle Hoffman

El Niño Winners and Losers Declared, p. 1182

Richard A. Kerr

Costs of a Clean Environment, p. 1182

Leslie Roberts

Briefings

Animal Rules Final, p. 1183

Constance Holden

Pauling at 90, p. 1183

Constance Holden

Bomb Detectors: OTA Thumbs Down, p. 1183

Constance Holden

Biotech: Rx for a Healthy Future, p. 1183

Constance Holden

Perspective

Bureaucratic Mischief: Recognizing Endangered Species and Subspecies, pp. 1187-1188

Stephen J. O'Brien; Ernst Mayr

The Current Situation in Mexican Immigration, pp. 1189-1193

Georges Vernez; David Ronfeldt

The Quark-Hadron Transition in Cosmology and Astrophysics, pp. 1194-1199

K. A. Olive

Diabetic Hyperglycemia: Link to Impaired Glucose Transport in Pancreatic β Cells, pp. 1200-1205

Roger H. Unger

Research Articles

Manipulation of Adsorbed Atoms and Creation of New Structures on Room-Temperature Surfaces with a Scanning Tunneling Microscope, pp. 1206-1210

L. J. Whitman; Joseph A. Stroscio; R. A. Dragoset; R. J. Celotta

Max: A Helix-Loop-Helix Zipper Protein That Forms a Sequence-Specific DNA-Binding Complex with Myc, pp. 1211-1217

Elizabeth M. Blackwood; Robert N. Eisenman

Reports

Auger Electron Angular Distributions from Surfaces: Direct Comparison with Isoenergetic Photoelectrons, pp. 1218-1220

Louis J. Terminello; John J. Barton

Evidence for an Inter-Organismic Heme Biosynthetic Pathway in Symbiotic Soybean Root Nodules, pp. 1220-1222

Indu Sangwan; Mark R. O'Brian

Induction of Self-Tolerance in T Cells But Not B Cells of Transgenic Mice Expressing Little Self Antigen, pp. 1223-1225

Stephen Adelstein; Helen Pritchard-Briscoe; Tracy A. Anderson; Jeffrey Crosbie; Guy Gammon; Robert H. Loblay; Antony Basten; Christopher C. Goodnow

Peripheral Selection of the T Cell Repertoire, pp. 1225-1228

Benedita Rocha; Harald von Boehmer

Split Anergy in a CD8⁺ T Cell: Receptor-Dependent Cytolysis in the Absence of Interleukin-2 Production, pp. 1228-1231

Gillis R. Otten; Ronald N. Germain

Regulation of Phospholipase C-γl by Profilin and Tyrosine Phosphorylation, pp. 1231-1233

Pascal J. Goldschmidt-Clermont; Jae Won Kim; Laura M. Machesky; Sue Goo Rhee; Thomas D. Pollard

Enhanced Motility in NIH 3T3 Fibroblasts That Overexpress Gelsolin, pp. 1233-1236

C. Casey Cunningham; Thomas P. Stossel; David J. Kwiatkowski

Isolation of Sequences That Span the Fragile X and Identification of a Fragile X-Related CpG Island, pp. 1236-1239

D. Heitz; F. Rousseau; D. Devys; S. Saccone; H. Abderrahim; D. Le Paslier; D. Cohen; A. Vincent; D. Toniolo; G. Della Valle; S. Johnson; D. Schlessinger; I. Oberle; J. L. Mandel

Subtle Cerebellar Phenotype in Mice Homozygous for a Targeted Deletion of the En-2 Homeobox, pp. 1239-1243

A. L. Joyner; K. Herrup; B. A. Auerbach; C. A. Davis; J. Rossant

Control of Larval Development by Chemosensory Neurons in Caenorhabditis elegans, pp. 1243-1246

Cornelia I. Bargmann; H. Robert Horvitz

Failure to Elicit Neuronal Macroscopic Mechanosensitive Currents Anticipated by Single-Channel Studies, pp. 1246-1249

Catherine E. Morris; Richard Horn

Paths of Information Flow Through Visual Cortex, pp. 1249-1251

Marc Mignard; Joseph G. Malpeli

The Role of the Primate Extrastriate Area V4 in Vision, pp. 1251-1253

Peter H. Schiller; Kyoungmin Lee

Book Reviews

Atomic Energy: The View from France, p. 1257

Atomic Rivals.

Bertrand Goldschmidt

Review author[s]: Lawrence Scheinman

The Career of a Methodology, p. 1258

Ratio Scaling of Psychological Magnitude. In Honor of the Memory of S. S. Stevens.

Stanley J. Bolanowski, Jr.; George A. Gescheider

Review author[s]: Robert Teghtsoonian

Before and After Phage, pp. 1258-1259

The Emergence of Bacterial Genetics.

Thomas D. Brock

Review author[s]: Jeffrey H. Miller

Reprints of Books Previously Reviewed, p. 1259

Books Received, p. 1259

Back Matter (21 pp.)

Previous Issue: New Series, Vol. 251, No. 4997, Mar. 1, 1991
Next Issue: New Series, Vol. 251, No. 4999, Mar. 15, 1991

Science, New Series, Vol. 251, No. 4999, Mar. 15, 1991

Previous Issue: New Series, Vol. 251, No. 4998, Mar. 8, 1991
Next Issue: New Series, Vol. 251, No. 5000, Mar. 22, 1991

Front Matter (15 pp.)
Desalination of Brackish and Marine Waters, p. 1289

Philip H. Abelson

Letters

NIH Misconduct Procedures: Effect of New Ruling, p. 1296

Jules V. Hallum; Suzanne W. Hadley

Energy Conservation, pp. 1296-1298

Arne P. Olson; A. David Rossin; Amory B. Lovins

Ribozyme Technology Patents, p. 1298

Allan R. Goldberg

Venus Lightning, pp. 1298-1299

R. N. Singh

Ulysses' Wobble, p. 1299

R. Elaerts

ScienceScope, p. 1301

David P. Hamilton

News and Comment

Learning From an Acid Rain Program, pp. 1302-1305

Leslie Roberts

NIH Takes Heat for Lax Investigation, p. 1305

David P. Hamilton

If at First, We Don't Succeed..., p. 1305

Gallo Challenged on HIV Isolates, p. 1306

Joseph Palca

Science Television: Colleagues on Cable, p. 1307

Marcia Barinaga

Science's 20 Greatest Hits Take Their Lumps, pp. 1308-1309

Elizabeth Culotta

Briefings

Indian Geologist Suspended, p. 1310

Constance Holden

Answer to Mad Cow Riddle?, p. 1310

Constance Holden

Hopes for Relic Florida Ecosystem, p. 1310

Constance Holden

Biomatrix Society, pp. 1310-1311

Constance Holden

Planetary Malignancy, p. 1311

Constance Holden

Stanford: New Focus on Teaching, p. 1311

Constance Holden

Super Linkage, p. 1311

Constance Holden

A Good Comet is Hard to Keep Down, p. 1311

Constance Holden

Research News

AIDS Vaccine Trials: Bumpy Road Ahead, pp. 1312-1313

Jon Cohen

Perestroika Comes to Earthquake Forecasts, pp. 1314-1316

Richard A. Kerr

Radioastronomers Seek a Clear Line to the Stars, p. 1316

Richard Stone

Possible New Colon Cancer Gene Found, p. 1317

Jean Marx

Fuel Ethanol from Cellulosic Biomass, pp. 1318-1323

Lee R. Lynd; Janet H. Cushman; Roberta J. Nichols; Charles E. Wyman

Why Gases Dissolve in Liquids, pp. 1323-1330

Gerald L. Pollack

Peptide Processing and Targeting in the Neuronal Secretory Pathway, pp. 1330-1335

Linda J. Jung; Richard H. Scheller

Research Article

Cosmology in the Laboratory: Defect Dynamics in Liquid Crystals, pp. 1336-1342

Isaac Chuang; Ruth Durrer; Neil Turok; Bernard Yurke

Reports

Atomic Force Microscopy of Atomic-Scale Ledges and Etch Pits Formed During Dissolution of Quartz, pp. 1343-1346

A. J. Gratz; S. Manne; P. K. Hansma

Fluid Dynamics in Suspension-Feeding Blackfish, pp. 1346-1348

S. Laurie Sanderson; Joseph J. Cech, Jr.; Mark R. Patterson

A Molecular Genetic Classification of Zooxanthellae and the Evolution of Animal-Algal Symbioses, pp. 1348-1351

Rob Rowan; Dennis A. Powers

Recombinase-Mediated Gene Activation and Site-Specific Integration in Mammalian Cells, pp. 1351-1355

Stephen O'Gorman; Daniel T. Fox; Geoffrey M. Wahl

Multiple Representations of Pain in Human Cerebral Cortex, pp. 1355-1358

Jeanne D. Talbot; Sean Marrett; Alan C. Evans; Ernst Meyer; M. Catherine Bushnell; Gary H. Duncan

Movement of Neural Activity on the Superior Colliculus Motor Map During Gaze Shifts, pp. 1358-1360

Douglas P. Munoz; Denis Pélisson; Daniel Guitton

Second Structural Motif for Recognition of DNA by Oligonucleotide-Directed Triple-Helix Formation, pp. 1360-1363

Peter A. Beal; Peter B. Dervan

An in Vivo Model of Somatic Cell Gene Therapy for Human Severe Combined Immunodeficiency, pp. 1363-1366

Giuliana Ferrari; Silvano Rossini; Raffaella Giavazzi; Daniela Maggioni; Nadia Nobili; Monica Soldati; Grace Ungers; Fulvio Mavilio; Eli Gilboa; Claudio Bordignon

Identification of a Gene Located at Chromosome 5q21 That is Mutated in Colorectal Cancers, pp. 1366-1370

Kenneth W. Kinzler; Mef C. Nilbert; Bert Vogelstein; Tracy M. Bryan; Daniel B. Levy; Kelly J. Smith; Antonette C. Preisinger; Stanley R. Hamilton; Phil Hedge; Alex Markham; Mary Carlson; Geoff Joslyn; Joanna Groden; Ray White; Yoshoi Miki; Yasuo Miyoshi; Isamu Nishisho; Yusuke Nakamura

Technical Comments

Sodium-Calcium Exchange, pp. 1370-1371

Edward A. Johnson; Renald D. Lemieux; Joseph R. Hume; Paul C. Levesque; Normand Leblanc; W. Jonathan Lederer; Ernst Niggli; Robert W. Hadley

Acoustic Chemical Sensors, p. 1372

Benedict J. Costello; Stuart W. Wenzel; Richard M. White; Michael D. Ward; Daniel A. Buttry

Book Reviews

The Idea of the Normal, p. 1373

The Taming of Chance.

Ian Hacking

Review author[s]: Margaret Schabas

The Newer Elements, p. 1374

The Elements Beyond Uranium.

Glenn T. Seaborg; Walter D. Loveland

Review author[s]: Harry E. Gove

Patterns of Change, pp. 1374-1375

Evolutionary Trends.

Kenneth J. McNamara

Review author[s]: Geerat J. Vermeij

LMCFs, pp. 1375-1376

Large Marine Ecosystems. Patterns, Processes, and Yields.

Kenneth Sherman; Lewis M. Alexander; Barry D. Gold

Review author[s]: Michael R. Reeve

Books Received, p. 1376

Back Matter (20 pp.)

Previous Issue: New Series, Vol. 251, No. 4998, Mar. 8, 1991
Next Issue: New Series, Vol. 251, No. 5000, Mar. 22, 1991

Science, New Series, Vol. 251, No. 5000, Mar. 22, 1991

Previous Issue: New Series, Vol. 251, No. 4999, Mar. 15, 1991
Next Issue: New Series, Vol. 251, No. 5001, Mar. 29, 1991

Front Matter (21 pp.)
National Energy Strategy, p. 1405

Philip H. Abelson

Letters

Science, Citation, and Funding, pp. 1408-1411

John A. Tainer; Helmut A. Abt; Lowell L. Hargens; David M. Bott; F. W. Lancaster; James H. Pannell; Edward B. Nuhfer; Charles L. McGehee; William A. Banks; David A. Pendlebury

System Safety, p. 1411

Donald A. Norman; Elisabeth Paté-Cornell

Policy Forum

Prioritizing Scientific Initiatives, pp. 1412-1413

John N. Bahcall

ScienceScope, p. 1415

David P. Hamilton

News and Comment

B Factories Have Physicists Buzzing, pp. 1416+1418-1419

Gary Taubes

Morale Plummets as SLAC Fails to Get Its Z⁰s, p. 1417

Robert Langreth

Will Fermilab Get Its Upgrade?, p. 1418

Anne Simon Moffat

Stanford In the Hot Seat, p. 1420

David P. Hamilton

Two Thumbs Down for Space Station, p. 1421

Eliot Marshall

More Pain for British Physicists, p. 1421

Jeremy Cherfas

Dutch AIDS Researchers Feel Heat of Publicity, pp. 1422-1423

Felix Eijgenraam

Committee Treats Healy Gently, p. 1423

Eliot Marshall

Briefings

Uncle Sam, the Energy Spendthrift, p. 1424

David P. Hamilton

Seeing the Future of Pharmaceuticals, p. 1424

David P. Hamilton

Stinging the "Killer" Bees, p. 1424

David P. Hamilton

Know Thy Reviewers, pp. 1424-1425

David P. Hamilton

The World's Greatest Invention Goes Micro, p. 1425

David P. Hamilton

Deforestation Slows, p. 1425

David P. Hamilton

A Cross-Section of the Science Manpower "Pipeline.", p. 1425

David P. Hamilton

Correction: Science Initiatives in the 1992 Budget, p. 1425

Research News

Is There a Massive Neutrino?, pp. 1426-1427+1428+1429

Paul Selvin

First Hominid Finds From Ethiopia in a Decade, p. 1428

Ann Gibbons

Astronomers Forge a Consensus for the 1990s, pp. 1429-1430

M. Mitchell Waldrop

Getting a Whiff of PittCon, pp. 1431-1432

Ivan Amato

Earth's Core-Mantle Boundary: Results of Experiments at High Pressures and Temperatures, pp. 1438-1443

Elise Knittle; Raymond Jeanloz

Cluster Assembly of Interfaces: Nanoscale Engineering, pp. 1444-1451

J. H. Weaver; G. D. Waddill

Cadherin Cell Adhesion Receptors as a Morphogenetic Regulator, pp. 1451-1455

Masatoshi Takeichi

Research Article

The Three-Dimensional Structure of Canine Parvovirus and Its Functional Implications, pp. 1456-1464

Jun Tsao; Michael S. Chapman; Mavis Agbandje; Walter Keller; Kathy Smith; Hao Wu; Ming Luo; Thomas J. Smith; Michael G. Rossmann; Richard W. Compans; Colin R. Parrish

Reports

Triton's Global Heat Budget, pp. 1465-1467

R. H. Brown; T. V. Johnson; J. D. Goguen; G. Schubert; M. N. Ross

Breaking the Diffraction Barrier: Optical Microscopy of a Nanometric Scale, pp. 1468-1470

E. Betzig; J. K. Trautman; T. D. Harris; J. S. Weiner; R. L. Kostelak

Aerobic Sulfate Reduction in Microbial Mats, pp. 1471-1473

Donald E. Canfield; David J. Des Marais

Variations in Terrigenous Input into the Deep Equatorial Atlantic During the Past 24,000 Years, pp. 1473-1476

Roger Francois; Michael P. Bacon

Repression of HIV-1 Transcription by a Cellular Protein, pp. 1476-1479

Hiroyuki Kato; Masami Horikoshi; Robert G. Roeder

A Nonconservative Serine to Cysteine Mutation in the Sulfate-Binding Protein, a Transport Receptor, pp. 1479-1481

Jing J. He; Florante A. Quiocho

Crystal Structure of Defensin HNP-3, an Amphiphilic Dimer: Mechanisms of Membrane Permeabilization, pp. 1481-1485

Christopher P. Hill; Jeff Yee; Michael E. Selsted; David Eisenberg

Cross-Regulatory Interactions Between the Proneural achaete and scute Genes of Drosophila, pp. 1485-1487

Carmen Martínez; Juan Modolell

Heteroplasmy Suggests Limited Biparental Inheritance of Mytilus Mitochondrial DNA, pp. 1488-1490

Walter R. Hoeh; Karen H. Blakley; Wesley M. Brown

Isolation of a rel-Related Human cDNA That Potentially Encodes the 65-kD Subunit of NF-κB, pp. 1490-1493

Steven M. Ruben; Patrick J. Dillon; Ralf Schreck; Thomas Henkel; Chein-Hwa Chen; Maureen Maher; Patrick A. Baeuerle; Craig A. Rosen

Babbling in the Manual Mode: Evidence for the Ontogeny of Language, pp. 1493-1496

Laura Ann Petitto; Paula F. Marentette

Software Reviews

Brain Browser: Hypercard Application for the Macintosh, pp. 1500-1502

Review author[s]: W. D. Willis, Jr.; James A. Koppe

Inside AAAS, pp. 1504-1505

Book Reviews

A Medical Investigation, pp. 1507-1508

Rocky Mountain Spotted Fever. History of a Twentieth-Century Disease.

Victoria A. Harden

Review author[s]: Robert Korstad

The Auditory Scene, pp. 1508-1509

Auditory Scene Analysis. The Perceptual Organization of Sound.

Albert S. Bregman

Review author[s]: Stewart H. Hulse

Molecular Gerontology, pp. 1509-1510

Molecular Biology of Aging.

Caleb E. Finch; Thomas E. Johnson

Review author[s]: Judith Campisi

Ferroelectrics for Optics, p. 1510

Physics and Chemistry of Crystalline Lithium Niobate

A. M. Prokhorov; Yu S. Kuz'minov

Review author[s]: Robert Feigelson

Books Received, pp. 1510-1511

Back Matter (25 pp.)

Previous Issue: New Series, Vol. 251, No. 4999, Mar. 15, 1991
Next Issue: New Series, Vol. 251, No. 5001, Mar. 29, 1991

Science, New Series, Vol. 251, No. 5001, Mar. 29, 1991

Previous Issue: New Series, Vol. 251, No. 5000, Mar. 22, 1991
Next Issue: New Series, Vol. 252, No. 5002, Apr. 5, 1991

Volume Information (10 pp.)
Front Matter (11 pp.)
An Overview of Overhead, p. 1545

Daniel E. Koshland, Jr.

Letters

An Analysis of Citation Analysis, p. 1546

R. C. von Borstel

Clean Air Act Amendments, pp. 1546-1547

William G. Rosenberg

Evaluating Teaching, p. 1547

Jay M. Pasachoff; Walter Debler; Timothy D. Johnston

Erratum: Exact Solution of Large Asymmetric Traveling Salesman Problems, p. 1547
ScienceScope, p. 1551

Eliot Marshall

News and Comment

NIH Finds Fraud in Cell Paper, pp. 1552-1554

David P. Hamilton

Who Found AZT Works for Aids?, p. 1554

Joseph Palca

OTA Challenges Dogma on Research Funding, p. 1555

Joseph Palca

Slimmer Station Wins White House Approval, pp. 1556-1557

Eliot Marshall

For Rent. Suitable Creative Thinker, p. 1557

Richard Sietmann

Better Data Needed on Sensitivity Syndrome, p. 1558

Marcia Barinaga

Research News

Ranking the Rain Forests, pp. 1559-1560

Leslie Roberts

Déjà Vu All Over Again: Chimp-Language Wars, pp. 1561-1562

Ann Gibbons

Rising Chemical "Stars" Could Play Many Roles, pp. 1562-1564

Joe Alper

"Spiral Forest" May Hold Clue to Thin-Film Superconductivity, pp. 1564-1565

Ivan Amato

Briefings

Brain Food?, p. 1566

David P. Hamilton

Selling the SSC to the Next Generation, p. 1566

David P. Hamilton

Psychological Risk Assessment, p. 1566

David P. Hamilton

A Physical Paradox, p. 1566

David P. Hamilton

Getting Around the Cosmic Censor, pp. 1566-1567

David P. Hamilton

Searching for Words, p. 1567

David P. Hamilton

Environmental Prize, p. 1567

David P. Hamilton

Correction: Gene Therapy: A New First?, p. 1567

America's Soaring Prison Population, pp. 1568-1573

Patrick A. Langan

Chemical and Biological Microstructures as Probed by Dynamic Processes, pp. 1574-1579

J. M. Drake; J. Klafter; P. Levitz

Cocaine Addiction: Psychology and Neurophysiology, pp. 1580-1586

Frank H. Gawin

Reports

Growth Mechanism of Sputtered Films of YBa₂Cu₃O₇ Studied by Scanning Tunneling Microscopy, pp. 1587-1589

Marilyn Hawley; Ian D. Raistrick; Jerome G. Beery; Robert J. Houlton

Self-Arrangement of Molybdenum Particles Into Cubes, pp. 1590-1592

A. S. Edelstein; G. M. Chow; E. I. Altman; R. J. Colton; D. M. Hwang

San Andreas Fault Zone Head Waves Near Parkfield, California, pp. 1592-1594

Yehuda Ben-Zion; Peter Malin

Microtektites, Microkrystites, and Spinels From a Late Pliocene Asteroid Impact in the Southern Ocean, pp. 1594-1597

Stanley V. Margolis; Philippe Claeys; Frank T. Kyte

Characterization of a Human TAR RNA-Binding Protein That Activates the HIV-1 LTR, pp. 1597-1600

Anne Gatignol; Alicia Buckler-White; Ben Berkhout; Kuan-Teh Jeang

In Vitro and in Vivo Consequences of VLA-2 Expression on Rhabdomyosarcoma Cells, pp. 1600-1602

Bosco M. C. Chan; Nariaki Matsuura; Yoshikazu Takada; Bruce R. Zetter; Martin E. Hemler

An Immunogenic Onchocerca volvulus Antigen: A Specific and Early Marker of Infection, pp. 1603-1605

Edgar Lobos; Niklaus Weiss; Marc Karam; Hugh R. Taylor; Eric A. Ottesen; Thomas B. Nutman

A Multisubunit Ribozyme That Is a Catalyst of and Template for Complementary Strand RNA Synthesis, pp. 1605-1608

Jennifer A. Doudna; Sandra Couture; Jack W. Szostak

Adrenergic Excitation of Cutaneous Pain Receptors Induced by Peripheral Nerve Injury, pp. 1608-1610

Jun Sato; Edward R. Perl

Regulation of Adhesion to ICAM-1 by the Cytoplasmic Domain of LFA-1 Integrin β Subunit, pp. 1611-1613

Margaret L. Hibbs; Hong Xu; Steven A. Stacker; Timothy A. Springer

Permeation of Calcium Ions Through Non-NMDA Glutamate Channels in Retinal Bipolar Cells, pp. 1613-1615

Timothy A. Gilbertson; Robert Scobey; Martin Wilson

Control of Embryonic Motoneuron Survival in Vivo by Ciliary Neurotrophic Factor, pp. 1616-1618

Ronald W. Oppenheim; David Prevette; Yin Qin-Wei; Frank Collins; John MacDonald

Technical Comment

Carbamate Formation and the Neurotoxicity of L-α Amino Acids, pp. 1619-1620

Peter B. Nunn; A. J. Davis; Paul O'Brien; John W. Olney; Charles Zorumski; Madelon T. Price; Joann Labruyere

Book Reviews

Hopes for America, pp. 1621-1622

Gunnar Myrdal and America's Conscience. Social Engineering and Racial Liberalism, 1938-1987.

Walter A. Jackson

Review author[s]: Katherine O'Sullivan See

Physics in Geneva, pp. 1622-1623

History of CERN. Vol. 2, Building and Running the Laboratory, 1954-1965.

Armin Hermann; John Krige; Ulrike Mersits; Dominique Pestre; Laura Weiss

Review author[s]: Lillian Hoddeson

----------------, pp. 1623-1624

A Statistical Model. Frederick Mosteller's Contributions to Statistics, Science, and Public Policy.

S. E. Fienberg; D. C. Hoaglin; W. H. Kruskal; J. M. Tanur; Cleo Youtz

Review author[s]: K. L.

----------------, p. 1624

Launching the Antibiotic Era. Personal Accounts of the Discovery and Use of the First Antibiotics.

Carol L. Moberg; Zanvil A. Cohn

Review author[s]: K. L.

Books Received, p. 1624

Back Matter (18 pp.)

Previous Issue: New Series, Vol. 251, No. 5000, Mar. 22, 1991
Next Issue: New Series, Vol. 252, No. 5002, Apr. 5, 1991

Science, New Series, Vol. 252, No. 5002, Apr. 5, 1991

Previous Issue: New Series, Vol. 251, No. 5001, Mar. 29, 1991
Next Issue: New Series, Vol. 252, No. 5003, Apr. 12, 1991

Front Matter (51 pp.)
Industrial Interactions with Universities, p. 9

Philip H. Abelson

Letters

Early "Fast Track", p. 11

Alan E. Shapiro

Drug Abuse Policy, pp. 11-14

Alan S. Hollister; Scott E. Lukas; Arthur P. Leccese; Avram Goldstein; Harold Kalant

Alzheimer's Disease Cell Bank, p. 14

Allen D. Roses; P. Michael Conneally

Erratum: High-Temperature Superconductivity Theory, p. 14
ScienceScope, p. 19

David P. Hamilton

News and Comment

U.S. Technology Strategy Emerges, pp. 20-22+23-24

Eliot Marshall

Sematech: Techno-Policy in Action, p. 23

David P. Hamilton

Calmer Waters at Primate Institute?, p. 24

Karen Wright

SSC's Forlorn Quest for Foreign Partners, p. 25

Mark Crawford

The Greening of the Green Revolution, p. 26

John Walsh

Research News

Testing of Autoimmune Therapy Begins, pp. 27-28

Jean Marx

Big Squeeze Points to a Big Quake, p. 28

Richard A. Kerr

Material Witnesses: APS Meeting in Cincinnati, pp. 29-30

Faye Flam

Finding a New Target for AIDS Therapy, p. 31

Joseph Palca

Old Bones Aren's So Bad After All, pp. 32-33

Richard A. Kerr

Briefings

New Cancer Data from Oak Ridge, p. 34

Constance Holden

Bok Successor Named, p. 34

Constance Holden

Cleaning up Thoroughbred Stock, p. 34

Constance Holden

Hubble Bashing on Prime Time, pp. 34-35

Constance Holden

Apples for Eternity, p. 35

Constance Holden

NIH Finds Misconduct at Georgetown, p. 35

Constance Holden

Chronicle Online, p. 35

Constance Holden

Was John Sununu Joking?, p. 35

Constance Holden

Japan Prize Confers $750,000, p. 35

Constance Holden

Perspective

Spiral Waves in Chemistry and Biology, p. 67

Irving R. Epstein

Deep-Focus Earthquakes and Recycling of Water into the Earth's Mantle, pp. 68-72

Charles Meade; Raymond Jeanloz

Tests of Time-Reversal Invariance in Atoms, Molecules, and the Neutron, pp. 73-79

L. R. Hunter

Plant Lipids: Metabolism, Mutants, and Membranes, pp. 80-87

Chris Somerville; John Browse

Research Article

Crystal Structure of the Ribonuclease H Domain of HIV-1 Reverse Transcriptase, pp. 88-95

Jay F. Davies, II; Zuzana Hostomska; Zdenek Hostomsky; Steven R. Jordan; David A. Matthews

Reports

Hidden Fermi Surface Nesting and Charge Density Wave Instability in Low-Dimensional Metals, pp. 96-98

M.-H. Whangbo; E. Canadell; P. Foury; J.-P. Pouget

Mite-Plant Associations from the Eocene of Southern Australia, pp. 99-101

Dennis J. O'Dowd; Christine R. Brew; David C. Christophel; Roy A. Norton

Strain Measurements and the Potential for a Great Subduction Earthquake Off the Coast of Washington, pp. 101-103

J. C. Savage; M. Lisowski

Approaches for Optimizing the First Electronic Hyperpolarizability of Conjugated Organic Molecules, pp. 103-106

S. R. Marder; D. N. Beratan; L.-T. Cheng

Reconciling the Magnitude of the Microscopic and Macroscopic Hydrophobic Effects, pp. 106-109

Kim A. Sharp; Anthony Nicholls; Richard F. Fine; Barry Honig

A New Mechanism for the Formation of Meteoritic Kerogen-Like Material, pp. 109-112

Windsor A. Morgan, Jr.; Eric D. Feigelson; Hai Wang; Michael Frenklach

Energetics of Caterpillar Locomotion: Biomechanical Constraints of a Hydraulic Skeleton, pp. 112-114

Timothy M. Casey

An Erythromycin Derivative Produced by Targeted Gene Disruption in Saccharopolyspora erythraea, pp. 114-117

J. M. Weber; J. O. Leung; S. J. Swanson; K. B. Idler; J. B. McAlpine

A Genetic Tool Used to Identify Thioredoxin as a Mediator of a Growth Inhibitory Signal, pp. 117-120

Louis P. Deiss; Adi Kimchi

Selective Activation of the B Natriuretic Peptide Receptor by C-Type Natriuretic Peptide (CNP), pp. 120-123

Kerry J. Koller; David G. Lowe; Gregory L. Bennett; Naoto Minamino; Kenji Kangawa; Hisayuki Matsuo; David V. Goeddel

Spiral Calcium Wave Propagation and Annihilation in Xenopus laevis Oocytes, pp. 123-126

James Lechleiter; Steven Girard; Ernest Peralta; David Clapham

Mediation of Responses to Calcium in Taste Cells by Modulation of a Potassium Conductance, pp. 126-128

Albertino R. Bigiani; Stephen D. Roper

Low-Resolution Real-Space Envelopes: An Approach to the Ab Initio Macromolecular Phase Problem, pp. 128-133

S. Subbiah

Technical Comments

Treating Parkinson's Disease with Lesions of the Subthalamic Nucleus, pp. 133-134

Patrick Aebischer; Moses Goddard; Hagai Bergman; Thomas Wichmann; Mahlon R. DeLong

Book Reviews

Enthusiastic Claims, pp. 142-143

Mapping the Code. The Human Genome Project and the Choices of Modern Science.

Joel Davis

Mapping our Genes. The Genome Project and the Future of Medicine.

Lois Wingerson

Genome. The Story of the Most Astonishing Scientific Adventure of Our Time-The Attempt to Map All the Genes in the Human Body.

Jerry E. Bishop; Michael Waldholz

Review author[s]: Diane B. Paul

Between Bosons and Fermions, p. 143

Fractional Statistics and Anyon Superconductivity.

Frank Wilczek

Review author[s]: Robert Joynt

Fisher's Letters, pp. 143-144

Statistical Inference and Analysis. Selected Correspondence of R. A. Fisher.

R. A. Fisher; J. H. Bennett

Review author[s]: Arthur P. Dempster

Books Received, pp. 144-146

Back Matter (34 pp.)

Previous Issue: New Series, Vol. 251, No. 5001, Mar. 29, 1991
Next Issue: New Series, Vol. 252, No. 5003, Apr. 12, 1991

Science, New Series, Vol. 252, No. 5003, Apr. 12, 1991

Previous Issue: New Series, Vol. 252, No. 5002, Apr. 5, 1991
Next Issue: New Series, Vol. 252, No. 5004, Apr. 19, 1991

Front Matter (21 pp.)
Science and Peace, p. 189

Daniel E. Koshland, Jr.

Letters

Museum of Comparative Zoology: Expanded "Skeleton Staff", p. 191

Edward O. Wilson

IQ and Heredity, pp. 191-192

Richard M. Dudley; Jonathan Beckwith; Lisa Geller; Sahotra Sarkar; Thomas J. Bouchard, Jr.; David T. Lykken; Matthew McGue; Nancy L. Segal; Auke Tellegen

Altruism: Docility or Group Identification?, p. 192

Linnda R. Caporael; Robyn M. Dawes; Herbert A. Simon

Erratum: Effectiveness of AIDS Vaccines, p. 192
ScienceScope, p. 199

News and Comment

Can David Kessler Revive the FDA?, pp. 200-203

Ann Gibbons

Candidate in Sight to Head Salk, p. 203

Yvonne Baskin

French AIDS Researcher Cleared, p. 203

Alexander Dorozynski

Ozone Destruction Worsens, p. 204

Richard A. Kerr

Greenhouse Policy: A Bargain?, pp. 204-205

Colin Norman

Microbes and "The Trabi Problem", p. 205

Michael Balter

Briefings

Secret Rocket, p. 206

Constance Holden

The Mind: Buddhism and Biology, p. 206

Constance Holden

Computerized Mandala-Dharma goes High-Tech, p. 206

Constance Holden

Darkness in the East, p. 206

Constance Holden

Antiviral AIDS Drug Nears Approval, pp. 206-207

Constance Holden

Appropriate Agriculture, p. 207

Constance Holden

Sleeping With Scuds, p. 207

Constance Holden

Largest-Ever Dinosaur Skull, p. 207

Constance Holden

Submariner to Captain Science Service, p. 207

Constance Holden

Research News

Piping X-Rays Through a Glass Brightly, pp. 208-209

Ivan Amato

How the Nose Knows: Olfactory Receptor Cloned, pp. 209-210

Marcia Barinaga

Research on Biological Pest Control Moves Ahead, pp. 211-212

Anne Simon Moffat

Magellan: No Venusian Plate Tectonics Seen, p. 213

Richard A. Kerr

Does Egg Beckon Sperm When the Time Is Right?, p. 214

Leslie Roberts

Single Electron Transistor Explained, p. 215

Faye Flam

A New Star Is Born, p. 215

Michelle Hoffman

Mantle Phase Changes and Deep-Earthquake Faulting in Subducting Lithosphere, pp. 216-225

Stephen H. Kirby; William B. Durham; Laura A. Stern

Models for Material Failure and Deformation, pp. 226-234

Paul Meakin

Pattern Formation During Animal Development, pp. 234-241

D. A. Melton

Research Article

Satellite-Image-Derived Velocity Field of an Antarctic Ice Stream, pp. 242-246

R. A. Bindschadler; T. A. Scambos

Reports

Magellan: Mission Summary, pp. 247-249

R. Stephen Saunders; Gordon H. Pettengill

An Overview of Venus Geology, pp. 249-252

R. Stephen Saunders; Raymond E. Arvidson; James W. Head III; Gerald G. Schaber; Ellen R. Stofan; Sean C. Solomon

Fundamental Issues in the Geology and Geophysics of Venus, pp. 252-260

Sean C. Solomon; James W. Head

Magellan: Radar Performance and Data Products, pp. 260-265

Gordon H. Pettengill; Peter G. Ford; William T. K. Johnson; R. Keith Raney; Laurence A. Soderblom

Magellan: Electrical and Physical Properties of Venus' Surface, pp. 265-270

G. Leonard Tyler; Peter G. Ford; Donald B. Campbell; Charles Elachi; Gordon H. Pettengill; Richard A. Simpson

Magellan: Initial Analysis of Venus Surface Modification, pp. 270-275

R. E. Arvidson; V. R. Baker; C. Elachi; R. S. Saunders; J. A. Wood

Venus Volcanism: Initial Analysis from Magellan Data, pp. 276-288

James W. Head; Donald B. Campbell; Charles Elachi; John E. Guest; Dan P. McKenzie; R. Stephen Saunders; Gerald G. Schaber; Gerald Schubert

Impact Craters on Venus: Initial Analysis from Magellan, pp. 288-297

Roger J. Phillips; Raymond E. Arvidson; Joseph M. Boyce; Donald B. Campbell; John E. Guest; Gerald G. Schaber; Laurence A. Soderblom

Venus Tectonics: Initial Analysis from Magellan, pp. 297-312

Sean C. Solomon; James W. Head; William M. Kaula; Dan McKenzie; Barry Parsons; Roger J. Phillips; Gerald Schubert; Manik Talwani

Crystal Structure of Osmylated C ₆₀ : Confirmation of the Soccer Ball Framework, pp. 312-313

Joel M. Hawkins; Axel Meyer; Timothy A. Lewis; Stefan Loren; Frederick J. Hollander

Book Reviews

Segregations, pp. 320-321

Job Queues, Gender Queues. Explaining Women's Inroads into Male Occupations.

Barbara F. Reskin; Patricia A. Roos

Review author[s]: Daniel B. Cornfield

The Perception of Odor, p. 321

The Vertebrate Olfactory System. Chemical Neuroanatomy, Function and Development.

Norbert Halász

Review author[s]: Robert R. H. Anholt

The Fern Gametophyte, pp. 321-322

Developmental Biology of Fern Gametophytes.

V. Raghavan

Review author[s]: Dean P. Whittier

----------------, p. 322

Rainforests. A Guide to Research and Tourist Facilities at Selected Tropical Forest Sites in Central and South America.

James L. Castner

Neotropical Rainforest Mammals. A Field Guide.

Louise H. Emmons; Francois Feer

Review author[s]: K. L.

Books Received, pp. 322-323

Back Matter (21 pp.)

Previous Issue: New Series, Vol. 252, No. 5002, Apr. 5, 1991
Next Issue: New Series, Vol. 252, No. 5004, Apr. 19, 1991

Science, New Series, Vol. 252, No. 5004, Apr. 19, 1991

Previous Issue: New Series, Vol. 252, No. 5003, Apr. 12, 1991
Next Issue: New Series, Vol. 252, No. 5005, Apr. 26, 1991

Front Matter (13 pp.)
Astrophysical Plasmas, p. 353

David Voss

Letters

Postal Service Here and Abroad, p. 358

Anthony M. Frank; Daniel E. Koshland, Jr.

Pesticide Use, pp. 358-359

Nancy N. Ragsdale; David Pimentel

Indirect Costs, p. 359

Michael P. Stryker; C. F. Quate

NSF Directorates, pp. 359-360

Jane Buikstra; Prudence Rice

AIDS Research at NIH, p. 360

Steve Brown; Jon Ende

Association Affairs

Science, Slogans, and Civic Duty, pp. 361-363

Donald N. Langenberg

ScienceScope, p. 365

News and Comment

Tiger Teams Draw Researchers' Snarls, pp. 366-368

Eliot Marshall

Privacy Rules Blindside French Glaucoma Effort, pp. 369-370

Alexander Dorozynski

A Fix for the FDA, p. 370

Ann Gibbons

Acid Rain Program: Mixed Review, p. 371

Leslie Roberts

A Lesson Learned, Again, at Valdez, p. 371

Richard A. Kerr

Research News

The Sobering Geography of AIDS, pp. 372-373

Joseph Palca

New Vector Delivers Genes to Lung Cells, p. 374

Michelle Hoffman

Fanning the Hope for Flat Diamond, p. 375

Ivan Amato

Pulling Neandertals Back Into Our Family Tree, p. 376

Elizabeth Culotta

Yucatan Killer Impact Gaining Support, p. 377

Richard A. Kerr

Mysterious Celestial Object Found, p. 377

Faye Flam

Lynn Margulis: Science's Unruly Earth Mother, pp. 378-381

Charles Mann

Briefings

Infectious Disease Grants, p. 382

Constance Holden

CF Screening Studies Nearing Reality, p. 382

Constance Holden

Myths and Maths, p. 382

Constance Holden

Looking for Loyalty in DNA, p. 382

Constance Holden

Perspective

Human Hemoglobin Switching, p. 383

George Stamatoyannopoulos

Astrophysical Plasmas

Dense Astrophysical Plasmas, pp. 384-389

H. M. Van Horn

Astrophysical Jets, pp. 389-396

David S. De Young

Interstellar Shock Waves, pp. 397-403

Christopher F. McKee; Bruce T. Draine

The Quasi-Stationary and Transient States of the Solar Wind, pp. 404-409

M. Neugebauer

Plasma Motions in Planetary Magnetospheres, pp. 410-415

T. W. Hill; A. J. Dessler

Reports

Laser Method for Synthesis and Processing of Continuous Diamond Films on Nondiamond Substrates, pp. 416-418

J. Narayan; V. P. Godbole; C. W. White

Folding and Unbinding Transitions in Tethered Membranes, pp. 419-422

Farid F. Abraham; Mehran Kardar

The Shapes and Sizes of Closed, Pressurized Random Walks, pp. 422-424

Joseph Rudnick; George Gaspari

A Virus-Encoded "Superantigen" in a Retrovirus-Induced Immunodeficiency Syndrome of Mice, pp. 424-427

Ambros W. Hügin; Melanie S. Vacchio; Herbert C. Morse III

Engraftment and Development of Human T and B Cells in Mice After Bone Marrow Transplantation, pp. 427-431

Ido Lubin; Yifat Faktorowich; Tsvee Lapidot; Yehudit Gan; Zelig Eshhar; Ephraim Gazit; Mia Levite; Yair Reisner

Adenovirus-Mediated Transfer of a Recombinant α1-Antitrypsin Gene to the Lung Epithelium in Vivo, pp. 431-434

Melissa A. Rosenfeld; Wolfgang Siegfried; Kunihiko Yoshimura; Koichi Yoneyama; Masashi Fukayama; Larue E. Stier; Paavo K. Pääkkö; Pascale Gilardi; Leslie D. Stratford-Perricaudet; Michel Perricaudet; Sophie Jallat; Andrea Pavirani; Jean-Pierre Lecocq; Ronald G. Crystal

Group I Intron Self-Splicing with Adenosine: Evidence for a Single Nucleoside-Binding Site, pp. 434-437

Michael D. Been; Anne T. Perrotta

Dynamic Tracking of Cardiac Vulnerability by Complex Demodulation of the T Wave, pp. 437-440

Bruce D. Nearing; Alice H. Huang; Richard L. Verrier

Recombinant Virus Vaccine-Induced SIV-Specific CD8⁺ Cytotoxic T Lymphocytes, pp. 440-443

Ling Shen; Zheng W. Chen; Michael D. Miller; Virginia Stallard; Gail P. Mazzara; Dennis L. Panicali; Norman L. Letvin

Calcium as a Coagonist of Inositol 1,4,5-Trisphosphate-Induced Calcium Release, pp. 443-446

Elizabeth A. Finch; Timothy J. Turner; Stanley M. Goldin

Primary Structure and Functional Activity of a Phosphatidylinositol-Glycan Specific Phospholipase D, pp. 446-448

Bernard J. Scallon; Wen-Jian C. Fung; T. Chris Tsang; Shirley Li; Helen Kado-Fong; Kuo-Sen Huang; Jarema P. Kochan

Technical Comment

Atrionatriuretic Peptide and Calcium-Conducting Sodium Channels, pp. 449-452

Michael F. Sheets; Dorothy A. Hanck; Lisa Ann Sorbera; Martin Morad

Book Reviews

AIDS from Its Beginnings, p. 453

History of AIDS. Emergence and Origin of a Modern Pandemic.

Mirko D. Grmek

Review author[s]: Elizabeth Fee

Regulation Reexamined, pp. 453-454

Rheostasis. The Physiology of Change.

N. Mrosovsky

Review author[s]: Albert F. Bennett

----------------, pp. 454-455

The Charm of Physics.

Sheldon L. Glashow

The Road from Los Alamos.

Hans A. Bethe

Citizen Scientist.

Frank von Hippel

Review author[s]: K. L.

----------------, p. 455

Headline News, Science Views.

David Jarmul

Review author[s]: K. L.

Back Matter (21 pp.)

Previous Issue: New Series, Vol. 252, No. 5003, Apr. 12, 1991
Next Issue: New Series, Vol. 252, No. 5005, Apr. 26, 1991

Science, New Series, Vol. 252, No. 5005, Apr. 26, 1991

Previous Issue: New Series, Vol. 252, No. 5004, Apr. 19, 1991
Next Issue: New Series, Vol. 252, No. 5006, May 3, 1991

Front Matter (31 pp.)
Waste Not, Want Some, p. 485

Daniel E. Koshland, Jr.

Letters

Science Funding, pp. 490-494

Jonathan Katz; Craig Loehle; Sandy Harcourt; Stanley L. Weinberg; David M. Einolf; Nathaniel Brenner; Rustum Roy; Leon Lederman

B Meson Lifetime, p. 494

Leslie J. Rosenberg

Erratum: Isolation of Sequences That Span the Fragile X and Identification of Fragile X-related CpG Island, p. 494

D. Heitz

Erratum: Kuwait's Unjust Deserts: Damage to Its Deserts, p. 494

Constance Holden

ScienceScope, p. 497

Eliot Marshall

News and Comment

DOE's Genome Project Comes of Age, pp. 498-501

Leslie Roberts

Deaths in Vaccine Trials Trigger French Inquiry, pp. 501-502

Alexander Dorozynski; Alun Anderson

Math Ph.D.s: Bleak Picture, pp. 502-503

Barry Cipra

Ecologists Set Broad Priorities for 1990s, p. 504

Ann Gibbons

Research News

On the Right Track to the NGF Receptor, pp. 505-506

Marcia Barinaga

An RNA First: It's Part of the Gene-Copying Machinery, pp. 506-507

Michelle Hoffman

Antinoise Creates the Sounds of Silence, pp. 508-509

Joe Alper

Do Anticracks Trigger Deep Earthquakes?, p. 510

Richard A. Kerr

Where Chemists React: ACS Meeting in Atlanta, p. 511

Ivan Amato

Briefings

Signs of Intelligent Life?, p. 512

Faye Flam

Opening the Mail, p. 512

Faye Flam

Voyage to Inner Earth, p. 512

Faye Flam

The Molecule That's Supercool, pp. 512-513

Faye Flam

Testy Fellows, p. 513

Faye Flam

No Free Lunch, p. 513

Faye Flam

Lonely Ph.D. Seeks Like, p. 513

Faye Flam

Grants Without Frontiers, p. 513

Faye Flam

Perspective

Progress Toward Malaria Preerythrocytic Vaccines, pp. 520-521

Stephen L. Hoffman; Victor Nussenzweig; Jerald C. Sadoff; Ruth S. Nussenzweig

Controlling Urban Air Pollution: A Benefit-Cost Assessment, pp. 522-528

Alan J. Krupnick; Paul R. Portney

Back-Action Evasion as an Alternative to Impedance Matching, pp. 528-532

B. Yurke

The Control of Oxidant Stress at Fertilization, pp. 533-536

Bennett M. Shapiro

Research Articles

Thermal Maps of Jupiter: Spatial Organization and Time Dependence of Stratospheric Temperatures, 1980 to 1990, pp. 537-542

Glenn S. Orton; A. James Friedson; John Caldwell; Heidi B. Hammel; Kevin H. Baines; Jay T. Bergstralh; Terry Z. Martin; Michael E. Malcom; Robert A. West; William F. Golisch; David M. Griep; Charles D. Kaminski; Alan T. Tokunaga; Richard Baron; Mark Shure

A Class III Transcription Factor Composed of RNA, pp. 542-546

Lisa S. Young; Heather M. Dunstan; Pamela R. Witte; Timothy P. Smith; Simone Ottonello; Karen U. Sprague

Reports

Ordered Overlayers of C ₆₀ on GaAs(110) Studied with Scanning Tunneling Microscopy, pp. 547-548

Y. Z. Li; J. C. Patrin; M. Chander; J. H. Weaver; L. P. F. Chibante; R. E. Smalley

The Higher Fullerenes: Isolation and Characterization of C ₇₆ , C ₈₄ , C ₉₀ , C ₉₄ , and C ₇₀ O, and Oxide of D _5h -C ₇₀, pp. 548-551

François Diederich; Roland Ettl; Yves Rubin; Robert L. Whetten; Rainer Beck; Marcos Alvarez; Samir Anz; Dilip Sensharma; Fred Wudl; Kishan C. Khemani; Andrew Koch

Deep UV Photochemistry of Chemisorbed Monolayers: Patterned Coplanar Molecular Assemblies, pp. 551-554

Charles S. Dulcey; Jacque H. Georger, Jr.; Victor Krauthamer; David A. Stenger; Thomas L. Fare; Jeffrey M. Calvert

The trk Proto-Oncogene Product: A Signal Transducing Receptor for Nerve Growth Factor, pp. 554-558

David R. Kaplan; Barbara L. Hempstead; Dionisio Martin-Zanca; Moses V. Chao; Luis F. Parada

Induction by NGF of Meiotic Maturation of Xenopus Oocytes Expressing the trk Proto-Oncogene Product, pp. 558-561

Angel R. Nebreda; Dionisio Martin-Zanca; David R. Kaplan; Luis F. Parada; Eugenio Santos

Chimeric NGF-EGF Receptors Define Domains Responsible for Neuronal Differentiation, pp. 561-563

Hai Yan; Joseph Schlessinger; Moses V. Chao

Clusters of Coupled Neuroblasts in Embryonic Neocortex, pp. 563-566

Joseph J. Lo Turco; Arnold R. Kriegstein

Direct Molecular Identification of the Mouse Pink-Eyed Unstable Mutation by Genome Scanning, pp. 566-569

Murray H. Brilliant; Yoichi Gondo; Eva M. Eicher

Determination of Primary Motoneuron Identity in Developing Zebrafish Embryos, pp. 569-572

Judith S. Eisen

OPC-21268, an Orally Effective, Nonpeptide Vasopressin V1 Receptor Antagonist, pp. 572-574

Yoshitaka Yamamura; Hidenori Ogawa; Tomihiko Chihara; Kazumi Kondo; Toshiyuki Onogawa; Shigeki Nakamura; Toyoki Mori; Michiaki Tominaga; Youichi Yabuuchi

Uncoupling of the Spectrin-Based Skeleton from the Lipid Bilayer in Sickled Red Cells, pp. 574-576

Shih-Chun Liu; Laura H. Derick; Sen Zhai; Jiri Palek

Regulation of Ras-GAP and the Neurofibromatosis-1 Gene Product by Eicosanoids, pp. 576-579

Jia-Wen Han; Frank McCormick; Ian G. Macara

Spatial Control of Gut-Specific Gene Expression During Caenorhabditis elegans Development, pp. 579-582

Eric J. Aamodt; May A. Chung; James D. McGhee

Inside AAAS, pp. 586-587

Book Reviews

Rainforest Assessments, p. 588

Australian Tropical Rainforests. Science-Values-Meaning.

L. J. Webb; J. Kikkawa

Review author[s]: Julie S. Denslow

Primitive Systems, pp. 588-589

Evolution of the First Nervous Systems.

Peter A. V. Anderson

Review author[s]: L. M. Passano

Reaction Pathways, p. 589

Intramolecular Motion and Chemical Reaction.

I. M. Mills; M. S. Child; R. A. Marcus

Review author[s]: Joel M. Bowman

Aspects of Magmatism, pp. 589-590

The Nature and Origin of Cordilleran Magmatism.

J. Lawford Anderson

Review author[s]: Paul C. Bateman

Back Matter (26 pp.)

Previous Issue: New Series, Vol. 252, No. 5004, Apr. 19, 1991
Next Issue: New Series, Vol. 252, No. 5006, May 3, 1991

Science, New Series, Vol. 252, No. 5006, May 3, 1991

Previous Issue: New Series, Vol. 252, No. 5005, Apr. 26, 1991
Next Issue: New Series, Vol. 252, No. 5007, May 10, 1991

Front Matter (12 pp.)
Research Funding, p. 625

Philip H. Abelson

Letters

Scientific Priorities, p. 629

George E. Brown, Jr.

Biotechnology Regulation, pp. 629-630

Greg Simon

Westinghouse Winners, pp. 630-631

Andrea Yates Blumberg

Museum Molecular Lab, p. 631

Michael Novacek

Molecular Structure of Charybdotoxin: Retraction, p. 631

Walter Massefski, Jr.; Alfred G. Redfield; Dennis R. Hare; Christopher Miller

Perspective

Molecular Probes for Rice Blast Disease, pp. 632-633

John E. Hamer

ScienceScope, p. 635

David P. Hamilton

News and Comment

Indirect Costs: The Gathering Storm, pp. 636-638

Joseph Palca

Galileo Hits a Snag, p. 638

Richard A. Kerr

No Citation Analyses Please, We're British, p. 639

Alun Anderson

Patriot's Scud Busting Record Is Challenged, pp. 640-641

Eliot Marshall

Conventional Math Tests Get Low Marks, p. 641

Michelle Hoffman

Briefings

Animal Rightists Win One..., p. 642

Constance Holden

...And Lose Another, p. 642

Constance Holden

Presidential Digital Commitment, p. 642

Constance Holden

New Eye on the High Seas, p. 642

Constance Holden

Nouvelle Cuisine, pp. 642-643

Constance Holden

$11.5-Million Housecleaning, p. 643

Constance Holden

Hope for African Elephants, p. 643

Constance Holden

A Man's Reach Must Exceed His Grasp, p. 643

Constance Holden

Research News

Exploring the New Material World, pp. 644-646

Ivan Amato

Rare Heart Disease Linked to Oncogene, p. 647

Jean Marx

Move Over, Mendeleyev, pp. 648-649

Faye Flam

Liquid Crystals Meet the Cosmos at APS Meeting, pp. 649-650

Faye Flam; Ann Finkbeiner

Hot-Spot Evolution and the Global Tectonics of Venus, pp. 651-658

Roger J. Phillips; Robert E. Grimm; Michael C. Malin

At the Crossroads of Chemistry and Immunology: Catalytic Antibodies, pp. 659-667

Richard A. Lerner; Stephen J. Benkovic; Peter G. Schultz

SH2 and SH3 Domains: Elements That Control Interactions of Cytoplasmic Signaling Proteins, pp. 668-674

C. Anne Koch; Deborah Anderson; Michael F. Moran; Christine Ellis; Tony Pawson

Research Articles

Modular Organization of Genes Required for Complex Polyketide Biosynthesis, pp. 675-679

Stefano Donadio; Michael J. Staver; James B. McAlpine; Susan J. Swanson; Leonard Katz

An Unexpectedly Efficient Catalytic Antibody Operating by Ping-Pong and Induced Fit Mechanisms, pp. 680-685

Peter Wirsching; Jon A. Ashley; Stephen J. Benkovic; Kim D. Janda; Richard A. Lerner

Reports

Multiple Light-Scattering Probes of Foam Structure and Dynamics, pp. 686-688

D. J. Durian; D. A. Weitz; D. J. Pine

Molecular Self-Assembly of Two-Terminal, Voltammetric Microsensors with Internal References, pp. 688-691

James J. Hickman; David Ofer; Paul E. Laibinis; George M. Whitesides; Mark S. Wrighton

Three-Dimensional Readout of Flash X-Ray Images of Living Sperm in Water by Atomic-Force Microscopy, pp. 691-693

T. Tomie; H. Shimizu; T. Majima; M. Yamada; T. Kanayama; H. Kondo; M. Yano; M. Ono

Atmospheric Lifetime of CHF₂Br, a Proposed Substitute for Halons, pp. 693-695

R. Talukdar; A. Mellouki; T. Gierczak; J. B. Burkholder; S. A. McKeen; A. R. Ravishankara

Partial Melting of the Allende (CV3) Meteorite: Implications for Origins of Basaltic Meteorites, pp. 695-698

A. J. G. Jurewicz; D. W. Mittlefehldt; J. H. Jones

Three-Dimensional Structure of Recombinant Human Interferon-γ, pp. 698-702

Steven E. Ealick; William J. Cook; Senadhi Vijay-Kumar; Mike Carson; Tattanahalli L. Nagabhushan; Paul P. Trotta; Charles E. Bugg

Fatal Sibling Aggression, Precocial Development, and Androgens in Neonatal Spotted Hyenas, pp. 702-704

Laurence G. Frank; Stephen E. Glickman; Paul Licht

Linkage of a Cardiac Arrhythmia, the Long QT Syndrome, and the Harvey ras-1 Gene, pp. 704-706

Mark Keating; Donald Atkinson; Christine Dunn; Katherine Timothy; G. Michael Vincent; Mark Leppert

Identification of p53 Gene Mutations in Bladder Cancers and Urine Samples, pp. 706-709

David Sidransky; Andrew Von Eschenbach; Yvonne C. Tsai; Peter Jones; Ian Summerhayes; Fray Marshall; Meera Paul; Pearl Green; Stanley R. Hamilton; Philip Frost; Bert Vogelstein

In Vivo Footprinting of MHC Class II Genes: Bare Promoters in the Bare Lymphocyte Syndrome, pp. 709-712

Catherine J. Kara; Laurie H. Glimcher

Presence of an SH2 Domain in the Actin-Binding Protein Tensin, pp. 712-715

Samuel Davis; Michael L. Lu; Su Hao Lo; Shin Lin; James A. Butler; Brian J. Druker; Thomas M. Roberts; Qi An; Lan Bo Chen

Protection Against Malaria by Vaccination with Sporozoite Surface Protein 2 Plus CS Protein, pp. 715-718

Srisin Khusmith; Yupin Charoenvit; Sanjai Kumar; Martha Sedegah; Richard L. Beaudoin; Stephen L. Hoffman

Biohybrid Artificial Pancreas: Long-Term Implantation Studies in Diabetic, Pancreatectomized Dogs, pp. 718-721

Susan J. Sullivan; Takashi Maki; Kermit M. Borland; Michele D. Mahoney; Barry A. Solomon; Thomas E. Muller; Anthony P. Monaco; William L. Chick

Transmission Between Pairs of Hippocampal Slice Neurons: Quantal Levels, Oscillations, and LTP, pp. 722-724

Roberto Malinow

Effect of Light Chain V Region Duplication on IgG Oligomerization and in Vivo Efficacy, pp. 724-727

Walter Shuford; Howard V. Raff; J. William Finley; James Esselstyn; Linda J. Harris

Book Reviews

Hypotheses about Japan, p. 728

Culture, Control, and Commitment. A Study of Work Organization and Work Attitudes in the United States and Japan.

James R. Lincoln; Arne L. Kalleberg; Mitsuyo Hanada; Kerry McBride

Review author[s]: Vladimir Pucik

The Early Earth, p. 729

Origin of the Earth.

Horton E. Newsom; John H. Jones

Review author[s]: Don L. Anderson

----------------, p. 729

Optics, Physiology and Vision. A Festschrift Honoring Professor Gerald Westheimer on His 65th Birthday.

Suzanne P. McKee; Ken Nakayama

Review author[s]: K. L.

----------------, pp. 729-730

Evolutionary Innovations.

Matthew H. Nitecki

Review author[s]: K. L.

----------------, p. 730

Insect Defenses. Adaptive Mechanisms and Strategies of Prey and Predators.

David L. Evans; Justin O. Schmidt

Review author[s]: K. L.

Books Received, pp. 730-731

Back Matter (17 pp.)

Previous Issue: New Series, Vol. 252, No. 5005, Apr. 26, 1991
Next Issue: New Series, Vol. 252, No. 5007, May 10, 1991

Science, New Series, Vol. 252, No. 5007, May 10, 1991

Previous Issue: New Series, Vol. 252, No. 5006, May 3, 1991
Next Issue: New Series, Vol. 252, No. 5008, May 17, 1991

Front Matter (22 pp.)
Technology for America's Future, p. 757

Philip H. Abelson

Letters

Science in the Persian Gulf, p. 763

Thomas M. Boyce

Math Problems, p. 763

Terence M. Murphy; Michael W. Levine; Robin D. Hanson; Craig Bond Hatfield; Daniel E. Koshland, Jr.

Energy Savings, pp. 763-764

Amory B. Lovins; George M. Barnwell

EPA Committee, p. 764

Mary Ellen O'Connor

Crystal Structure of Bee-Venom Phospholipase A₂: Correction, p. 764

David L. Scott; Zbyszek Otwinowski; Michael H. Gelb; Paul B. Sigler

Membrane-Bound Phosphotyrosine Phosphatases, p. 764

Alan F. Williams

ScienceScope, p. 767

David P. Hamilton

News and Comment

Baltimore Throws in the Towel, pp. 768-770

David P. Hamilton

The True Source of HIV?, p. 771

Joseph Palca

Science Under Wraps in Prince William Sound, pp. 772-773

Lisa Busch

Briefings

Hidden Costs of the Space Station, p. 774

Ivan Amato

A Billion Bucks for Materials, p. 774

Ivan Amato

A Big Gift From Big Oil, p. 774

Ivan Amato

Congressional Day, pp. 774-775

Ivan Amato

Cuban AIDS Control, p. 775

Ivan Amato

Ten Years for the Brain, p. 775

Ivan Amato

Biotechnology Execs Earn More, p. 775

Ivan Amato

Correction: Looking for Loyalty in DNA, p. 775

Research News

Engineering Dogma Gives Way to Chaos, pp. 776-778

Robert Langreth

A New Ball Game in Nuclear Physics, p. 778

Faye Flam

How Peptide Hormones Get Ready for Work, pp. 779-780

Jean Marx

Praying Mantises Play Top Gun, p. 781

Ivan Amato

Sex and the Single Gene, p. 782

Jeremy Cherfas

Deep Rocks Stir the Mantle Pot, p. 783

Richard A. Kerr

Reproductive Behavior and Health in Consanguineous Marriages, pp. 789-794

Alan H. Bittles; William M. Mason; Jennifer Greene; N. Appaji Rao

Neutron Scattering: Progress and Prospects, pp. 795-802

J. D. Axe

Diversity of G Proteins in Signal Transduction, pp. 802-808

Melvin I. Simon; Michael P. Strathmann; Narasimhan Gautam

Research Articles

Zinc Finger-DNA Recognition: Crystal Structure of a Zif268-DNA Complex at $\overset{\circ}{\mathrm A}$, pp. 809-817

Nikola P. Pavletich; Carl O. Pabo

A New Cofactor in a Prokaryotic Enzyme: Tryptophan Tryptophylquinone as the Redox Prosthetic Group in Methylamine Dehydrogenase, pp. 817-824

William S. McIntire; David E. Wemmer; Andrei Chistoserdov; Mary E. Lidstrom

Reports

Geometry, Topology, and Universality of Random Surfaces, pp. 825-827

Jayanath R. Banavar; Amos Maritan; Attilio Stella

Ultradeep (>300 Kilometers) Ultramafic Xenoliths: Petrological Evidence from the Transition Zone, pp. 827-830

Violaine Sautter; Stephen E. Haggerty; Stephen Field

In Situ Biodegradation: Microbiological Patterns in a Contaminated Aquifer, pp. 830-833

Eugene L. Madsen; James L. Sinclair; William C. Ghiorse

Control of doublesex Alternative Splicing by transformer and transformer-2 in Drosophila, pp. 833-836

Kazuyuki Hoshijima; Kunio Inoue; Ikuko Higuchi; Hiroshi Sakamoto; Yoshiro Shimura

Solution Structure of FKBP, a Rotamase Enzyme and Receptor for FK506 and Rapamycin, pp. 836-839

Stephen W. Michnick; Michael K. Rosen; Thomas J. Wandless; Martin Karplus; Stuart L. Schreiber

Atomic Structure of FKBP-FK506, an Immunophilin-Immunosuppressant Complex, pp. 839-842

Gregory D. Van Duyne; Robert F. Standaert; P. Andrew Karplus; Stuart L. Schreiber; Jon Clardy

HBV X Protein Alters the DNA Binding Specificity of CREB and ATF-2 by Protein-Protein Interactions, pp. 842-844

Hugh F. Maguire; James P. Hoeffler; Aleem Siddiqui

Inhibition of PDGF β Receptor Signal Transduction by Coexpression of a Truncated Receptor, pp. 844-848

Hikaru Ueno; Heather Colbert; Jaime A. Escobedo; Lewis T. Williams

FTZ-F1, a Steroid Hormone Receptor-Like Protein Implicated in the Activation of fushi tarazu, pp. 848-851

Giovanni Lavorgna; Hitoshi Ueda; Joachim Clos; Carl Wu

Ca ²⁺ Permeability of KA-AMPA-Gated Glutamate Receptor Channels Depends on Subunit Composition, pp. 851-853

Michael Hollmann; Melissa Hartley; Stephen Heinemann

Experimental Therapy of Human Glioma by Means of a Genetically Engineered Virus Mutant, pp. 854-856

Robert L. Martuza; Amy Malick; James M. Markert; Katherine L. Ruffner; Donald M. Coen

Identification of a Peptide Specific for Aplysia Sensory Neurons by PCR-Based Differential Screening, pp. 856-859

Jean-François Brunet; Eli Shapiro; Sharon A. Foster; Eric R. Kandel; Yuichi Iino

Technical Comment

Land Plants and Weathering, p. 860

Jennifer M. Robinson; Robert A. Berner

Book Reviews

Chemistry Regenerated, pp. 863-864

Physical Chemistry from Ostwald to Pauling. The Making of a Science in America.

John W. Servos

Review author[s]: Robert Friedel

Weatherwatchers, p. 864

Meteorology in America, 1800-1870.

James Rodger Fleming

Review author[s]: Bruce Sinclair

An Emergent Field, pp. 864-865

Fundamentals of Molecular Evolution.

Wen-Hsiung Li; Dan Graur

Review author[s]: Michael T. Clegg

Reprints of Books Previously Reviewed, p. 865

Books Received, p. 865

Back Matter (23 pp.)

Previous Issue: New Series, Vol. 252, No. 5006, May 3, 1991
Next Issue: New Series, Vol. 252, No. 5008, May 17, 1991

Science, New Series, Vol. 252, No. 5008, May 17, 1991

Previous Issue: New Series, Vol. 252, No. 5007, May 10, 1991
Next Issue: New Series, Vol. 252, No. 5009, May 24, 1991

Front Matter (20 pp.)
Book Reviews in Science, p. 897

Philip H. Abelson

Letters

Carcinogenesis Mechanisms: The Debate Continues, pp. 902-904

Bruce N. Ames; Lois S. Gold; Samuel M. Cohen; Leon B. Ellwein; Frederica P. Perera; David P. Rall; I. B. Weinstein

ScienceScope, p. 907

Eliot Marshall

News and Comment

Showdown at the Waxahachie Corral, pp. 908-910

David P. Hamilton

Proposals to Limit Indirect Costs Emerge in Congress, p. 910

Joseph Palca

EPA Moves to Reassess the Risk of Dioxin, p. 911

Leslie Roberts

Was Underwater "Shot" Harmful to the Whales?, pp. 912-914

Jon Cohen

East German Cancer Data: A Benefit of Big Brother?, p. 915

Richard Sietmann

Briefings

GAO Questions Census Adjustment, p. 916

Constance Holden

Slugging It Out Over Left-Handed Mortality, p. 916

Constance Holden

Digital Harvest, p. 916

Constance Holden

How About Men Only for Mars?, pp. 916-917

Constance Holden

Animal Rights Food Groups, p. 917

Constance Holden

Crowded Dial, p. 917

Constance Holden

Thier to Head Brandeis, p. 917

Constance Holden

The Eating Right Pyramid, p. 917

Constance Holden

Research News

A "New Look" for Archeology, pp. 918-920

Ann Gibbons

Making Waves With Interfering Atoms, pp. 921-922

Faye Flam

Shine On, Holey Silicon, pp. 922-923

Ivan Amato

Perspective

A Partnership Between the Dioxin Receptor and a Basic Helix-Loop-Helix Protein, pp. 924-925

Eric F. Johnson

Core Formation During Early Accretion of the Earth, pp. 926-933

Horton E. Newsom; Kenneth W. W. Sims

Discrimination Between Intracellular Uptake and Surface Adhesion of Bacterial Pathogens, pp. 934-938

Ralph R. Isberg

Research Article

Synchronous Bursts of Action Potentials in Ganglion Cells of the Developing Mammalian Retina, pp. 939-943

Markus Meister; Rachel O. L. Wong; Denis A. Baylor; Carla J. Shatz

Reports

Epitaxial Cuprate Superconductor/Ferroelectric Heterostructures, pp. 944-946

R. Ramesh; A. Inam; W. K. Chan; B. Wilkens; K. Myers; K. Remschnig; D. L. Hart; J. M. Tarascon

Calcic Micas in the Allende Meteorite: Evidence for Hydration Reactions in the Early Solar Nebula, pp. 946-949

Lindsay P. Keller; Peter R. Buseck

Samarium-Neodymium Direct Dating of Fluorite Mineralization, pp. 949-951

J. T. Chesley; A. N. Halliday; R. C. Scrivener

A Calcium-Dependent Protein Kinase with a Regulatory Domain Similar to Calmodulin, pp. 951-954

Jeffrey F. Harper; Michael R. Sussman; G. Eric Schaller; Cindy Putnam-Evans; Harry Charbonneau; Alice C. Harmon

Cloning of a Factor Required for Activity of the Ah (Dioxin) Receptor, pp. 954-958

Emily C. Hoffman; Herminio Reyes; Fong-Fong Chu; Fred Sander; Linda H. Conley; Barbara A. Brooks; Oliver Hankinson

Site-Specific Recombination Between Homologous Chromosomes in Drosophila, pp. 958-961

Kent G. Golic

LAV Revisited: Origins of the Early HIV-1 Isolates from Institut Pasteur, pp. 961-965

Simon Wain-Hobson; Jean-Pierre Vartanian; Michel Henry; Nicole Chenciner; Rémi Cheynier; Sylvie Delassus; Livia Pedroza Martins; Monica Sala; Marie-Thérèse Nugeyre; Denise Guétard; David Klatzmann; Jean-Claude Gluckman; Willy Rozenbaum; Franc̨oise Barré-Sinoussi; Luc Montagnier

Similarity of Human Mitochondrial Transcription Factor 1 to High Mobility Group Proteins, pp. 965-969

Melissa A. Parisi; David A. Clayton

Retronphage φR73: An E. coli Phage That Contains a Retroelement and Integrates into a tRNA Gene, pp. 969-971

Sumiko Inouye; Melvin G. Sunshine; Erich W. Six; Masayori Inouye

Spectral Tuning of Pigments Underlying Red-Green Color Vision, pp. 971-974

Maureen Neitz; Jay Neitz; Gerald H. Jacobs

Technical Comments

Detecting Potassium on Mercury, pp. 974-975

R. M. Killen; A. E. Potter; T. H. Morgan; A. L. Sprague; R. W. H. Kozlowski; D. M. Hunten

Book Reviews

Republics of Science, pp. 976-978

Solomon's House Revisited. The Organization and Institutionalization of Science.

Tore Frängsmyr

Review author[s]: Kathryn M. Olesko

Sociological Explanations, pp. 978-979

Theories of Science in Society.

Susan E. Cozzens; Thomas F. Gieryn

Review author[s]: Henry Etzkowitz

Matters of Graphics, pp. 979-980

Representation in Scientific Practice.

Michael Lynch; Steve Woolgar

Envisioning Information.

Edward R. Tufte

Review author[s]: Ian Hacking

Ventures in Popularization, pp. 980-981

La Science pour tous. Sur la Vulgarisation Scientifique en France de 1850 à 1914.

Bruno Béguet

Review author[s]: Mary Jo Nye

A Modern Necessity, pp. 981-982+984

Electrifying America. Social Meanings of a New Technology, 1880-1940.

David E. Nye

Review author[s]: Claude S. Fischer

Elusive Exactitude, pp. 984-985

Keeping Watch. A History of American Time.

Michael O'Malley

Review author[s]: Patricia Cline Cohen

Reshapings by Disease, pp. 985-986

The AIDS Disaster. The Failure of Organizations in New York and the Nation.

Charles Perrow; Mauro F. Guillen

A Disease of Society. Cultural and Institutional Responses to AIDS.

Dorothy Nelkin; David P. Willis; Scott V. Parris

Review author[s]: Peter Conrad

The Provision of Life, pp. 986-988

Fatal Years. Child Mortality in Late Nineteenth-Century America.

Samuel H. Preston; Michael R. Haines

Save the Babies. American Public Health Reform and the Prevention of Infant Mortality, 1850-1929.

Richard A. Meckel

Review author[s]: Janet Golden

Transformations on Campus, pp. 988-989

Gender and Higher Education in the Progressive Era.

Lynn D. Gordon

Review author[s]: Louise Stevenson

Current Patterns, pp. 989-990

Educated in Romance. Women, Achievement, and College Culture.

Dorothy C. Holland; Margaret A. Eisenhart

Review author[s]: Myra Marx Ferree

Cosmic Thinkers, pp. 990-991

Standing on the Shoulders of Giants. A Longer View of Newton and Halley. Essays Commemorating the Tercentenary of Newton's Principia and the 1985-1986 Return of Comet Halley.

Norman W. Thrower

Review author[s]: Michael S. Mahoney

Victorian Friends, pp. 991-992

The Correspondence Between Sir George Gabriel Stokes and Sir William Thomson, Baron Kelvin of Largs.

David B. Wilson

Review author[s]: Bruce J. Hunt

Aspects of Darwin, pp. 992-993

Charles Darwin. A Biography.

John Bowlby

Charles Darwin. The Man and His Influence.

Peter J. Bowler

Review author[s]: William Montgomery

Tales Retold, pp. 993-994

Narratives of Human Evolution.

Misia Landau

Review author[s]: David L. Hull

The Events Stemming from Utah, pp. 994-995

Too Hot To Handle. The Race for Cold Fusion.

Frank Close

Review author[s]: Thomas F. Gieryn

Epochs in Physics, pp. 995-996

The Joy of Insight. Passions of a Physicist.

Victor Weisskopf

Review author[s]: Robert N. Cahn

Views of a Comet, pp. 998-999

Comet Halley. Investigations, Results, Interpretations.

J. W. Mason

Review author[s]: Michael F. A'Hearn

Planetary Adventures, pp. 999-1000

Uranus. The Planet, Rings and Satellites.

Ellis D. Miner

Review author[s]: Bradford A. Smith

A Paradox for Biology, pp. 1000-1001

Evolutionary Biology of Aging.

Michael R. Rose

Review author[s]: Linda Partridge

A Popular Protein, p. 1001

Cytochromes c. Evolutionary, Structural and Physicochemical Aspects.

Geoffrey R. Moore; Graham W. Pettigrew

Review author[s]: E. Margoliash

Linked Functions, pp. 1001-1002

Binding and Linkage. Functional Chemistry of Biological Macromolecules.

Jeffries Wyman; Stanley J. Gill

Review author[s]: Serge N. Timasheff

The Phylogenetic Perspective, pp. 1002-1003

Phylogeny, Ecology, and Behavior. A Research Program in Comparative Biology.

Daniel R. Brooks; Deborah A. McLennan

Review author[s]: Jonathan B. Losos

The Birds Reclassified, pp. 1003-1005

Phylogeny and Classification of Birds. A Study in Molecular Evolution.

Charles G. Sibley; Jon E. Ahlquist

Review author[s]: Frank B. Gill; Frederick H. Sheldon

Extinct New Zealanders, pp. 1005-1006

Prodigious Birds. Moas and Moa-Hunting in Prehistoric New Zealand.

Atholl Anderson

Review author[s]: Alan Feduccia

Reptilians Past, p. 1006

Dinosaur Tracks.

Tony Thulborn

Dinosaurs, Spitfires, and Sea Dragons.

Christopher McGowan

Review author[s]: Kevin Padian

A Repopulation, pp. 1006+1008

After the Ice Age. The Return of Life to Glaciated North America.

E. C. Pielou

Review author[s]: S. David Webb

Tropical Sites, pp. 1008-1009

Four Neotropical Rainforests.

Alwyn H. Gentry

Review author[s]: Theodore H. Fleming

The Sunshine State, pp. 1009-1010

Ecosystems of Florida.

Ronald L. Myers; John J. Ewel

The Rivers of Florida.

Robert J. Livingston

Review author[s]: William H. Schlesinger

Work at Oxford, p. 1010

Elton's Ecologists. A History of the Bureau of Animal Population.

Peter Crowcroft

Review author[s]: Charles J. Krebs

Naymlap and Company, pp. 1011-1012

The Northern Dynasties. Kingship and Statecraft in Chimor.

Michael E. Moseley; Alana Cordy-Collins

Review author[s]: Helaine Silverman

The Ordering of a City, pp. 1012+1014

New York City Neighborhoods. The 18th Century.

Nan A. Rothschild

Review author[s]: Barbara J. Little

Bounded Economics, pp. 1014-1015

Models of My Life.

Herbert A. Simon

Review author[s]: Frank Hahn

An Alternative to Associationism, pp. 1015-1016

The Organization of Learning

C. R. Gallistel

Review author[s]: William Timberlake

Language Without Cognition, pp. 1016+1018+1020

Laura. A Case for the Modularity of Language.

Jeni E. Yamada

Review author[s]: Jean Berko Gleason

Social Impressions, p. 1020

Interpersonal Perception.

Edward E. Jones

Review author[s]: Mark R. Lepper

Books Reviewed in Science 18 May 1990 Through 10 May 1991, pp. 1020-1022

Back Matter (14 pp.)

Previous Issue: New Series, Vol. 252, No. 5007, May 10, 1991
Next Issue: New Series, Vol. 252, No. 5009, May 24, 1991