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Science, New Series, Vol. 237, No. 4821, Sep. 18, 1987


Previous Issue: New Series, Vol. 237, No. 4820, Sep. 11, 1987
Next Issue: New Series, Vol. 237, No. 4822, Sep. 25, 1987


Front Matter (51 pp.)
The DNA Dragon 1, p. 1397
Daniel E. Koshland


Letters
Cost of International Congresses, p. 1399
Carlos Schubert
Risk Assessment, p. 1399
Ellen K. Silbergeld
Risk Assessment: Response, pp. 1399-1400
Bruce N. Ames; Lois Swirsky Gold; Renae Magaw
Risk Assessment: Response, p. 1400
Richard Wilson; E. A. C. Crouch


Erratum: Taking a Closer Look at AIDS Virus Relatives, p. 1400


Policy Forum
A Competitive R&D Strategy for U.S. Agriculture, pp. 1401-1402
Don Holt


News & Comment
A $30-Billion Space Station?, p. 1403
Eliot Marshall
Federal Report on Acid Rain Draws Criticism, pp. 1404-1406
Leslie Roberts
Choppin Takes Reins at Howard Hughes, pp. 1406-1407
Barbara J. Culliton
A Close-Up Look at a Secret Soviet Radar, pp. 1408-1409
Colin Norman
The Odyssey of a Brochure on AIDS, p. 1410
William Booth


Research News
Human Genome: Questions of Cost, pp. 1411-1412
Leslie Roberts
Assessing the Risks of Microbial Release, pp. 1413-1417
Jean L. Marx


Three-Dimensional X-Ray Microtomography, pp. 1439-1444
Brian P. Flannery; Harry W. Deckman; Wayne G. Roberge; Kevin L. D'Amico

The Cognitive Unconscious, pp. 1445-1452
John F. Kihlstrom

After Insulin Binds, pp. 1452-1458
Ora M. Rosen

Meiotic Recombination in Yeast: Alteration by Multiple Heterozygosities, pp. 1459-1465
Rhona H. Borts; James E. Haber


Reports
Refractory Interplanetary Dust Particles, pp. 1466-1468
Michael E. Zolensky
Oxygen Isotopes in Refractory Stratospheric Dust Particles: Proof of Extraterrestrial Origin, pp. 1468-1471
Kevin D. McKeegan
A Simple Model for Neutrino Cooling of the Large Magellanic Cloud Supernova, pp. 1471-1473
D. N. Spergel; T. Piran; A. Loeb; J. Goodman; J. N. Bahcall
Differential Expression of c-myb mRNA in Murine B Lymphomas by a Block to Transcription Elongation, pp. 1473-1476
Timothy P. Bender; Craig B. Thompson; W. Michael Kuehl
Expression of an Exogenous Growth Hormone Gene by Transplantable Human Epidermal Cells, pp. 1476-1479
Jeffrey R. Morgan; Yann Barrandon; Howard Green; Richard C. Mulligan
Uromodulin (Tamm-Horsfall Glycoprotein): A Renal Ligand for Lymphokines, pp. 1479-1484
Catherine Hession; Jean M. Decker; Anne P. Sherblom; Satish Kumar; Cho C. Yue; Robert J. Mattaliano; Richard Tizard; Eric Kawashima; Ursula Schmeissner; Sheryl Heletky; E. Pingchang Chow; Cynthia A. Burne; Alan Shaw; Andrew V. Muchmore
Saccharomyces cerevisiae Has a U1-Like Small Nuclear RNA with Unexpected Properties, pp. 1484-1487
Paul G. Siliciano; Michele Haltiner Jones; Christine Guthrie
A Sea Urchin Gene Encodes a Polypeptide Homologous to Epidermal Growth Factor, pp. 1487-1490
Deborah A. Hursh; Mary E. Andrews; Rudolf A. Raff
Acantharian Fluxes and Strontium to Chlorinity Ratios in the North Pacific Ocean, pp. 1490-1494
R. E. Bernstein; P. R. Betzer; R. A. Feely; R. H. Byrne; M. F. Lamb; A. F. Michaels


Book Reviews
A Quest for Preeminence, pp. 1515-1516
The Launching of Modern American Science, 1846-1876
Robert V. Bruce
Review author[s]: Lester D. Stephens
Theories of Human Diversity, pp. 1516-1517
Victorian Anthropology
George W. Stocking
Review author[s]: James A. Boon
Planetary Moons, p. 1517
Satellites
Joseph A. Burns; Mildred Shapley Matthews
Review author[s]: John S. Lewis
Transmitters and Receptors, pp. 1517-1518
Excitatory Amino Acid Transmission
T. Philip Hicks; David Lodge; Hugh McLennan
Review author[s]: Amy MacDermott


Back Matter (27 pp.)

Previous Issue: New Series, Vol. 237, No. 4820, Sep. 11, 1987
Next Issue: New Series, Vol. 237, No. 4822, Sep. 25, 1987



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