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Science, New Series, Vol. 268, No. 5210, Apr. 28, 1995


Previous Issue: New Series, Vol. 268, No. 5209, Apr. 21, 1995
Next Issue: New Series, Vol. 268, No. 5211, May 5, 1995


Front Matter (27 pp.)
Editorial: Noitall Seeks New Horizons, p. 479
Daniel E. Koshland Jr.


Letters
On the Potential of Molecular Computing, pp. 481-484
Michal Linial; Nathan Linial; Y.-M. D. Lo; K. F. C. Yiu; S. L. Wong; Barry Bunow; Leonard M. Adleman
Gravitational Theory, pp. 484-485
Carroll O. Alley; Hüseyin Yilmaz
Rosetta: An ESA Mission, p. 485
R. M. Bonnet


Corrections and Clarifications: Evidence from 18S Ribosomal DNA that the Lophophorates are Protostome Animals, p. 485
Corrections and Clarifications: Random Samples, p. 485
ScienceScope, p. 487
Richard Stone


News and Comment
Cold War Rivals Find Common Ground, pp. 488-491
Gary Taubes
ESO and Chile Begin to Clear the Air, pp. 491-492
Daniel Clery
U.K. Panel Weighs Tissue Ownership, p. 492
Claire O'Brien
U.S., Europe Clash Over Plan To Set Policy on Data Access, p. 493
Andrew Lawler
Multiple 'SIDS' Case Ruled Murder, p. 494
Ginger Pinholster
Companies Fear FDA Rule on Antibodies, p. 494
Richard Stone


Research News
Old Dates for Modern Behavior, pp. 495-496
Ann Gibbons
Forecasting the Northern Lights, pp. 496-497
James Glanz
NASA's Space Biology Program Shows Signs of Life, pp. 497-498
Rachel Nowak
A Boom in Plans for DNA Computing, pp. 498-499
Robert Pool
Chemists Self-Assemble in Southern California, pp. 500-501
Robert F. Service
Catching Fly Balls: A New Model Steps Up to the Plate, p. 502
Barry Cipra


Random Samples, pp. 503+505
Constance Holden


Policy Forum
Economic Growth, Carrying Capacity, and the Environment, pp. 520-521
Kenneth Arrow; Bert Bolin; Robert Costanza; Partha Dasgupta; Carl Folke; C. S. Holling; Bengt-Owe Jansson; Simon Levin; Karl-Göran Mäler; Charles Perrings; David Pimentel


Perspectives
Functions of the Proteasome: The Lysis at the End of the Tunnel, pp. 522-523
Alfred L. Goldberg
From the Cradle to the Grave: Ring Complexes in the Life of a Protein, pp. 523-524
Jonathan S. Weissman; Paul B. Sigler; Arthur L. Horwich


In from the Cold: Prospects for Conversion of the Defense Industrial Base, pp. 525-532
Maryellen R. Kelley; Todd A. Watkins


Research Article
Crystal Structure of the 20S Proteasome from the Archaeon T. acidophilum at 3.4 Å Resolution, pp. 533-539
Jan Löwe; Daniela Stock; Bing Jap; Peter Zwickl; Wolfgang Baumeister; Robert Huber


Reports
Discovery of an Unmelted H-Chondrite Inclusion in an Iron Metorite, pp. 540-542
Ignacio Casanova; Thomas Graf; Kurt Marti
DNA Solution of Hard Computational Problems, pp. 542-545
Richard J. Lipton
Computation Beyond the Turing Limit, pp. 545-548
Hava T. Siegelmann
Dating and Context of Three Middle Stone Age Sites with Bone Points in the Upper Semliki Valley, Zaire, pp. 548-553
Alison S. Brooks; David M. Helgren; Jon S. Cramer; Alan Franklin; William Hornyak; Jody M. Keating; Richard G. Klein; William J. Rink; Henry Schwarcz; J. N. Leith Smith; Kathlyn Stewart; Nancy E. Todd; Jacques Verniers; John E. Yellen
A Middle Stone Age Worked Bone Industry from Katanda, Upper Semliki Valley, Zaire, pp. 553-556
John E. Yellen; Alison S. Brooks; Els Cornelissen; Michael J. Mehlman; Kathlyn Stewart
Crystal Structure of DCoH, a Bifunctional, Protein-Binding Transcriptional Coactivator, pp. 556-559
James A. Endrizzi; Jeff D. Cronk; Weidong Wang; Gerald R. Crabtree; Tom Alber
Masking of the CBF1/RBPJ κ Transcriptional Repression Domain by Epstein-Barr Virus EBNA2, pp. 560-563
James J.-D. Hsieh; S. Diane Hayward
Expression Cloning of a Protective Leishmania Antigen, pp. 563-566
Evelyne Mougneau; Frédéric Altare; Adil E. Wakil; Shichun Zheng; Thierry Coppola; Zhi-En Wang; Rainer Waldmann; Richard M. Locksley; Nicholas Glaichenhaus
Role of B61, the Ligand for the Eck Receptor Tyrosine Kinase, in TNF- α-Induced Angiogenesis, pp. 567-569
Akhilesh Pandey; Haining Shao; Rory M. Marks; Peter J. Polverini; Vishva M. Dixit
How Baseball Outfielders Determine Where to Run to Catch Fly Balls, pp. 569-573
Michael K. McBeath; Dennis M. Shaffer; Mary K. Kaiser
Potentiated Necrosis of Cultured Cortical Neurons by Neurotrophins, pp. 573-575
Jae-Young Koh; Byoung J. Gwag; Doug Lobner; Dennis W. Choi
In Vivo Functional Analysis of the Ras Exchange Factor Son of Sevenless, pp. 576-579
Chris A. Karlovich; Laura Bonfini; Linda McCollam; Ronald D. Rogge; Andrea Daga; Michael P. Czech; Utpal Banerjee
Proteasome from Thermoplasma acidophilum: A Threonine Protease, pp. 579-582
Erika Seemüller; Andrei Lupas; Daniela Stock; Jan Löwe; Robert Huber; Wolfgang Baumeister


Technical Comments
Herpes-Like Sequences in HIV-Infected and Uninfected Kaposi's Sarcoma Patients, pp. 582-583
John A. Ambroziak; David J. Blackbourn; Brian G. Herndier; Richard G. Glogau; John H. Gullett; Alex R. McDonald; Evelyne T. Lennette; Jay A. Levy
Building an Associative Memory Vastly Larger Than the Brain, pp. 583-585
Eric B. Baum
Neutrophils and Drug Metabolism, pp. 585-586
Sherko von Schmiedeberg; Carsten Goebel; Ernst Gleichmann; Jack Uetrecht; Robert L. Rubin
Thumbs, Tools, and Early Humans, pp. 586-589
W. C. McGrew; Mark W. Hamrick; Sandra E. Inouye; James C. Ohman; Melissa Slanina; Gail Baker; Robert P. Mensforth; Randall L. Susman


Inside AAAS, pp. 590-591
Diana Pabst

Back Matter (17 pp.)

Previous Issue: New Series, Vol. 268, No. 5209, Apr. 21, 1995
Next Issue: New Series, Vol. 268, No. 5211, May 5, 1995



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