ISSN 0036-807510 MAY 1996VOLUME 272NUMBER 5263

AMERICANAssoCIATION FORTHEADVANCEMENT OFSCIENCE

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NEWS & COMMENTGoldin Puts NASA on New TrajectoryA New Reason for Being: Science

Report Backs Science, Not New Station

Academy's About-Face on Forensic DNA

Five-Year Science Plan Under Debate

Monkey Study Prompts High-LevelPublic Health Response

NSF to Take Closer Look atHow Support Shapes Careers

Scientists Seek Allies in FightAgainst Pseudoscience

National Academy of SciencesElects New Members

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RESEARCH NEWSLikely HIV Cofactor Found

Just How Old Is That DNA, Anyway?

California Social Climbers: LowWater Prompts High Status

Added Weight for Neutrino Mass Claim

SOHO Turns an Unblinking Eyeon a Turbulent Sun

Revised Galileo Data LeaveJupiter Mysteriously Dry

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A First Glimpse of Strange Matter? 81

Impact of DNA Replication 81 EErrors Put to the Test

Volcano-Ice Age Link Discounted 81

PERSPECTIVESRecycling Osmium r 82E

J. E. Snow

Uncharacteristic Earthquakes on 82Ethe San Andreas FaultL. B. Grant

Transcription Factor IIA: A r 827Structure with Multiple FunctionsR. H. Jacobson and R. Tjian

Getting Down to the Core of 82EHomologous RecombinationA. Stasiak

Dengue Hemorrhagic Fever 829A. A. James

RESEARCH ARTICLECrystal Structure of the Yeast Pr 83CTFIIA/TBP/DNA Complex

J. H. Geiger, S. Hahn, S. Lee, P. B. Sigler

REPORTS 00- iGALILEO PROBES JUPITER'S ATMOSPHERE

Galileo Probe: In Situ Observations of 837Jupiter's AtmosphereR. E. Young, M. A. Smith, C. K. Sobeck

W!-,4, A :` .4 .} e, ;e- <-Boarof Rviewing Ediors, "Xwwa>vf4CCo>f>fW; ;0e+< w

Frederick W. AltDon L. AndersonMichael AshburnerStephen J. BenkovicAlan BernsteinDavid E. BloomPiet BorstHenry R. BourneMichael S. BrownJames J. BullKathryn CalameDennis W. Choi

David ClaphamAdrienne E. ClarkeJohn M. CoffinF. Fleming CrimPaul J. CrutzenJames E. DahlbergRobert DesimonePaul T. EnglundG. ErtlRichard G. FairbanksDouglas T. FearonHarry A. Fozzard

Roger 1. M. GlassStephen P. GoffPeter N. GoodfellowCorey S. GoodmanPeter GrussPhilip C. HanawaltNobutaka HirokawaTomas HokfeltTasuku HonjoSusan D. IversenEric F. JohnsonStephen M. Kosslyn

Michael LaBarberaNicole Le DouarinCharles S. Levings Ill

Harvey F. LodishRichard LosickReinhard LuhrmannRuth Lynden-BellSeth MarderDiane MathisAnthony R. MeansShigetada NakanishiKim Nasmyth

Roger A. NicollStaffan NormarkStuart L. PimmYeshayau PockerRalph S. QuatranoMartin RaffV. RamanathanDouglas C. ReesT. M. RiceDavid C. RubieErkki RuoslahtiGottfried Schatz

Jozef SchellRonald H. SchwartzTerrence J. SejnowskiThomas A. SteitzMichael P. StrykerTomoyuki TakahashiMasatoshi TakeichiKeiji TanakaRobert T. N. TjianYoshinori TokuraEmil R. UnanueGeerat J. Vermeij

Bert VogelsteinArthur WeissZena WerbGeorge M. WhitesidesOwen N. WitteWilliam A. Wulf

SCIENCE * VOL. 272 * 10 MAY 1996

SCIENCE

800Forging a new NASA

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DEPARTMENTSTHIS WEEK IN SCIENCE 789 SCIENCESCOPE 799

EDITORIAL 791 RANDOM SAMPLES 819German Science in a Changing World BOOK REVIEWS 822H. Marki

LETTERS 793 PRODUCTS & MATERIALS 898

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Thermal image of Jupiter's clouds at a wavelength of4.85 micrometers. The image was acquired at theNASA Infrared Telescope Facility (IRTF), Mauna Kea,Hawaii, on 21 November 1995, 16 days before theGalileo probe entered the atmosphere at the location

in the cloud field indicated by the circle with thecentral dot. See page 839, the related Reports begin-ning on page 837, and the News story on page 814.[Image: G. S. Orton, J. I. L. Ortiz, T. Z. Martin, and theNASA IRTF]

Earth-Based Observations of theGalileo Probe Entry SiteG. Orton et al.

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Comparison of Galileo-Probe and 841Earth-Based Translation Rates of Jupiter'sEquatorial CloudsR. F. Beebe, A. A. Simon, L. F. Huber

Galileo Doppler Measurements of the 842Deep Zonal Winds at JupiterD. H. Atkinson, J. B. Pollack, A. Seiff

Structure of the Atmosphere of Jupiter: 844Galileo Probe MeasurementsA. Seiff et al.

The Galileo Probe Mass Spectrometer: r 846Composition of Jupiter's AtmosphereH. B. Niemann et al.

The Helium Mass Fraction in 849Jupiter's AtmosphereU. von Zahn and D. M. Hunten

Solar and Thermal Radiation in 851Jupiter's Atmosphere: Initial Results of theGalileo Probe Net Flux RadiometerL. A. Sromovsky et al.

Results of the Galileo Probe 854Nephelometer ExperimentB. Ragent, D. S. Colbum, P. Avrin, K. A. Rages

High-Energy Charged Particles in theInnermost Jovian MagnetosphereH. M. Fischer et al.

Radio Frequency Signals inJupiter's AtmosphereL. J. Lanzerotti et al.

Osmium Recycling in SubductionZonesA. D. Brandon et al.

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Amino Acid Racemization and the oPreservation of Ancient DNAH. N. Poinar, M. H6ss, J. L. Bada, S. Paabo

Polymers with Very Low Polydispersitiesfrom Atom Transfer Radical PolymerizationT. E. Patten et al.

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Homologous DNA Pairing Promoted !' 868by a 20-Amino Acid Peptide Derived from RecA0. N. Voloshin, L. Wang, R. D. Camerini-Otero

HIV-1 Entry Cofactor: Functional r 872cDNA Cloning of a Seven-Transmembrane,G Protein-Coupled ReceptorY. Feng, C. C. Broder, P. E. Kennedy, E. A. Berger

Requirement of p27KiP1 for RestrictionPoint Control of the Fibroblast Cell CycleS. Coats et al.

A U1/U4/U5 snRNP Complex Inducedby a 2'-O-Methyl-OligoribonucleotideComplementary to U5 snRNAG. Ast and A. M. Weiner

Genetically Engineered Resistance to rDengue-2 Virus Transmission in MosquitoesK. E. Olson et al.

Two Genetically Separable Steps in theDifferentiation of Thymic EpitheliumM. Nehls et al.

Chemical Usurpation of a Nest byPaper Wasp ParasitesA.-G. Bagneres et al.

An Enhanced Immune Response in MiceLacking the Transcription Factor NFAT1S. Xanthoudakis et al.

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TECHNICAL COMMENTS- ----1Hydrogen-Based Microbial Ecosystems 896in the EarthE. L. Madsen; D. R. Lovley and F. H. Chapelle;T. Stevens and J. McKinley

m AAAS Board of Directors O Indicates accompanying featureRita R. Colwell

Retiring President,Chairman

Jane LubchencoPresident

Mildred S. DresselhausPresident-elect

Sheila JasanoffWilliam A. Lester Jr.

Simon A. Levin

Marcia C. LinnMichael J. NovacekAnna C. RooseveltJean E. TaylorNancy S. Wexler

William T. GoldenTreasurer

Richard S. NicholsonExecutive Officer

* SCIENCE (ISSN 0036-8075) is published weekly on Friday, exceptthe last week In December, by the American Association for the Ad-vancement of Science, 1200 New York Avenue, NW, Washington, DC20005. Second-class postage (publication No. 484460) paid at Washington, DC,and additional mailing offices. Copyright 1996 by the American Association forthe Advancement of Science. The title SCIENCE is a registered trademark of theAAAS. Domestic individual membership and subscription (51 issues): $102 ($55allocated tosubscription). Domestic institutional subscription (51 issues): $250.Foreign postage extra: Mexico, Caribbean (surface mail) $55; other coun-tries (air assist delivery) $90. First class, airmail, student, and emeritus rateson request. Canadian rates with GST available upon request, GST #1254 88122.Printed in the U.S.A.

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