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Science, New Series, Vol. 268, No. 5209, Apr. 21, 1995


Previous Issue: New Series, Vol. 268, No. 5208, Apr. 14, 1995
Next Issue: New Series, Vol. 268, No. 5210, Apr. 28, 1995


Front Matter (13 pp.)
Editorial: The Pharmacia Biotech & Science Prize, p. 347
Daniel E. Koshland Jr.


Letters
Guidelines for Xenotransplantation, p. 349
Ralph B. Dell; Donald S. Kornfeld
U.S. Neutron Sources, pp. 349-350
J. Michael Rowe; Louis Ianniello
AIDS Data, pp. 350-352
Peter Duesberg; Michael S. Ascher; Haynes W. Sheppard; Warren Winkelstein Jr.
Cell Cycle Arrest, p. 352
Richard Steinman; Barbara Hoffman; Dan A. Liebermann; Paul B. Fisher
"More" Is Not "Different", p. 352
Ulrich Melcher
Sampling Zooplankton: Correction, pp. 352-353
Dean Roemmich; John McGowan


ScienceScope, p. 355
Richard Stone


News and Comment
A Molecular Approach to Cancer Risk, pp. 356-357
Richard Stone
Report Advocates "Value-Added" Ph.D, p. 358
Constance Holden
Academy Fends Off Charges of Bias, pp. 358-359
Andrew Lawler
In the U.S., Engineers Oust Old Regime, p. 359
Eliot Marshall
NASA, Academy to Re-Examine EOS, p. 360
Andrew Lawler
Germans Buy Nature's Publisher, p. 360
Rachel Nowak
NASA Panel Would Drop Ames Lab, p. 361
Andrew Lawler
Partisan Politics Comes to the Fore, p. 361
Andrew Lawler; Eliot Marshall


Research News
Antibodies Linked to Rare Epilepsy, pp. 362-363
Marcia Barinaga
U.S. Climate Tilts Toward the Greenhouse, pp. 363-364
Richard A. Kerr
Anthropologists Overturn Old Ideas About New Developments, pp. 364-365
Elizabeth Culotta
Dwarfs and Dim Galaxies Mark Limits of Knowledge, pp. 366-367
Alexander Hellemans
Researchers Find Molecules That Muzzle Killer Cells, pp. 367-368
Marcia Barinaga
New Hope Against Blindness, pp. 368-369
Jon Cohen


Random Samples, p. 371
Constance Holden


Perspectives
Pas de Deux or More: The Sulfonylurea Receptor and K+ Channels, pp. 372-373
Louis H. Philipson; Donald F. Steiner
Adaptive Mutation: Who's Really in the Garden?, pp. 373-374
James A. Shapiro


The Silica Balance in the World Ocean: A Reestimate, pp. 375-379
Paul Tréguer; David M. Nelson; Aleido J. Van Bennekom; David J. DeMaster; Aude Leynaert; Bernard Quéguiner


Research Article
Mercury-199 NMR of the Metal Receptor Site in MerR and Its Protein-DNA Complex, pp. 380-385
Lisa M. Utschig; James W. Bryson; Thomas V. O'Halloran


Reports
Continent-Ocean Chemical Heterogeneity in the Mantle Based on Seismic Tomography, pp. 386-388
Alessandro M. Forte; Adam M. Dziewonski; Richard J. O'Connell
Selectivity of End-Cretaceous Marine Bivalve Extinctions, pp. 389-391
David Jablonski; David M. Raup
Seismic Images of Active Magma Systems Beneath the East Pacific Rise Between 17°05′ and 17°35′S, pp. 391-395
John C. Mutter; Suzanne M. Carbotte; Wusi Su; Liqing Xu; Peter Buhl; Robert S. Detrick; Graham M. Kent; John A. Orcutt; Alistair J. Harding
The Collapse of Free Polymer Chains in a Network, pp. 395-397
Robert M. Briber; Xiaodu Liu; Barry J. Bauer
High-Temperature Molecular Magnets Based on Cyanovanadate Building Blocks: Spontaneous Magnetization at 230 K, pp. 397-400
William R. Entley; Gregory S. Girolami
Orientational and Magnetic Ordering of Buckyballs in TDAE-C 60, pp. 400-402
D. Mihailovic; D. Arcon; P. Venturini; R. Blinc; A. Omerzu; P. Cevc
Superantigen-Dependent, Cell-Mediated Cytotoxicity Inhibited by MHC Class I Receptors on T Lymphocytes, pp. 403-405
Joseph H. Phillips; Jenny E. Gumperz; Peter Parham; Lewis L. Lanier
Cloning of Immunoglobulin-Superfamily Members Associated with HLA-C and HLA-B Recognition by Human Natural Killer Cells, pp. 405-408
Marco Colonna; Jacqueline Samaridis
The Role of Igβ in Precursor B Cell Transition and Allelic Exclusion, pp. 408-411
Fotini Papavasiliou; Ziva Misulovin; Heikyung Suh; Michel C. Nussenzweig
FAP-1: A Protein Tyrosine Phosphatase That Associates with Fas, pp. 411-415
Takaaki Sato; Shinji Irie; Shinichi Kitada; John C. Reed
Initiation of Protein Synthesis by the Eukaryotic Translational Apparatus on Circular RNAs, pp. 415-417
Chang-you Chen; Peter Sarnow
Adaptive Mutation in Escherichia coli: A Role for Conjugation, pp. 418-420
J. Pablo Radicella; Peter U. Park; Maurice S. Fox
Evidence That F Plasmid Transfer Replication Underlies Apparent Adaptive Mutation, pp. 421-423
Timothy Galitski; John R. Roth
Cloning of the β Cell High-Affinity Sulfonylurea Receptor: A Regulator of Insulin Secretion, pp. 423-426
Lydia Aguilar-Bryan; Colin G. Nichols; Sérgio W. Wechsler; John P. Clement IV; A. E. Boyd III; Gabriela González; Haydée Herrera-Sosa; Kimberly Nguy; Joseph Bryan; Daniel A. Nelson
Mutations in the Sulfonylurea Receptor Gene in Familial Persistent Hyperinsulinemic Hypoglycemia of Infancy, pp. 426-429
Pamela M. Thomas; Gilbert J. Cote; Nelson Wohllk; Bassem Haddad; P. M. Mathew; Wolfgang Rabl; Lydia Aguilar-Bryan; Robert F. Gagel; Joseph Bryan
Induction of Apoptosis in Uninfected Lymphocytes by HIV-1 Tat Protein, pp. 429-431
Chiang J. Li; David J. Friedman; Chuanlin Wang; Valeri Metelev; Arthur B. Pardee
FGF Binding and FGF Receptor Activation by Synthetic Heparan-Derived Di- and Trisaccharides, pp. 432-436
David M. Ornitz; Andrew B. Herr; Marianne Nilsson; Jacob Westman; Carl-Magnus Svahn; Gabriel Waksman
Measurement of Interhelical Electrostatic Interactions in the GCN4 Leucine Zipper, pp. 436-439
Kevin J. Lumb; Peter S. Kim
Nicotinic Receptor Binding Site Probed with Unnatural Amino Acid Incorporation in Intact Cells, pp. 439-442
Mark W. Nowak; Patrick C. Kearney; Jeffrey R. Sampson; Margaret E. Saks; Cesar G. Labarca; Scott K. Silverman; Wenge Zhong; Jon Thorson; John N. Abelson; Norman Davidson; Peter G. Schultz; Dennis A. Dougherty; Henry A. Lester


Technical Comments
Patterns of Human Growth, pp. 442-447
Claudine Heinrichs; Peter J. Munson; Debra R. Counts; Gordon B. Cutler Jr.; Jeffrey Baron; Michelle Lampl; Noël Cameron; Johannes D. Veldhuis; Michael L. Johnson
Variability Among Human Umbilical Vein Endothelial Cultures, pp. 447-448
Cornelius A. Watson; Louise Camera-Benson; Rebecca Palmer-Crocker; Jordan S. Pober; A. E. Koch; P. J. Polverini; S. L. Kunkel; L. A. Harlow; L. A. DiPietro; V. M. Elner; S. G. Elner; R. M. Strieter


Book Reviews
Intracellular Structures, p. 449
Microtubules.
Jeremy S. Hyams; Clive W. Lloyd
Review author[s]: Patricia Wadsworth
----------------, pp. 449-450
Mechanisms of Protein Folding.
Roger H. Pain
Review author[s]: Katherine Livingston
----------------, p. 450
Aotus. The Owl Monkey.
Janet F. Baer; Richard E. Weller; Ibulaimu Kakoma
Review author[s]: Katherine Livingston
----------------, p. 450
Dating in Exposed and Surface Contexts.
Charlotte Beck
Review author[s]: Katherine Livingston
Books Received, p. 451


Back Matter (17 pp.)

Previous Issue: New Series, Vol. 268, No. 5208, Apr. 14, 1995
Next Issue: New Series, Vol. 268, No. 5210, Apr. 28, 1995



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