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Science, New Series, Vol. 257, No. 5074, Aug. 28, 1992


Previous Issue: New Series, Vol. 257, No. 5073, Aug. 21, 1992
Next Issue: New Series, Vol. 257, No. 5075, Sep. 4, 1992


Front Matter (16 pp.)
Editorial: Agricultural Research, p. 1187
Philip H. Abelson


Letters
The Possibility of Tenure, p. 1188
Jenny Harrison
GenPharm's Knockout Mice, p. 1188
Jonathan J. MacQuitty; Robert M. Kay
Exclusive Academies, pp. 1188-1189
Cesare Emiliani
Fetal Tissue Supply, pp. 1189-1190
Jennie Kline; Ann Kinney; Zena Stein; Mervyn Susser; Dorothy Warburton


Corrections and Clarifications: Calcium Entry through Kainate Receptors and Resulting Potassium-Channel Blockade in Bergmann Glial Cells, p. 1190
ScienceScope, p. 1195
David P. Hamilton


News and Comment
Cracks in the Ivory Tower, pp. 1196-1199+1200+1201
Eliot Marshall; Joseph Palca
Teaching vs. Research, p. 1200
E. M.; J. P.
A Threat to Graduate Research, p. 1201
J. T.
Oregon Becomes a Test Case for Health Care Reform, pp. 1202-1203
Virgina Morell
Dingell Launches a New Investigation, p. 1203
David P. Hamilton
How to Sample the World's Genetic Diversity, pp. 1204-1205
Leslie Roberts


Random Samples, pp. 1206-1207
Ivan Amato


Research News
Mapping the River in the Sky, pp. 1208-1210
Ann Finkbeiner
The Wide World of Geography Turns in Washington, pp. 1210-1211
Dawn Levy; Richard Stone
Awakenings...UV Light and HIV Gene Activation, pp. 1211-1212
Brigid M. Wallace; Jill S. Lasker
Chemical Society Hosts Biotech Gathering, p. 1213
Richard Stone


The Huastec Region: A Second Locus for the Production of Bronze Alloys in Ancient Mesoamerica, pp. 1215-1220
Dorothy Hosler; Guy Stresser-Pean

Protein Oxidation and Aging, pp. 1220-1224
Earl R. Stadtman


Research Articles
Specification of Subunit Assembly by the Hydrophilic Amino-Terminal Domain of the Shaker Potassium Channel, pp. 1225-1230
Min Li; Yuh Nung Jan; Lily Yeh Jan
Controlling Cardiac Chaos, pp. 1230-1235
Alan Garfinkel; Mark L. Spano; William L. Ditto; James N. Weiss


Reports
Mechanisms of Porphyroblast Crystallization: Results from High-Resolution Computed X-ray Tomography, pp. 1236-1239
William D. Carlson; Cambria Denison
Mount Pinatubo Aerosols, Chlorofluorocarbons, and Ozone Depletion, pp. 1239-1242
Guy Brasseur; Claire Granier
Manganese Flux from Continental Margin Sediments in a Transect Through the Oxygen Minimum, pp. 1242-1245
Kenneth S. Johnson; William M. Berelson; Kenneth H. Coale; Teresa L. Coley; Virginia A. Elrod; W. Russell Fairey; Helen D. Iams; Tammy E. Kilgore; Jocelyn L. Nowicki
Tentoxin Sensitivity of Chloroplasts Determined by Codon 83 of β Subunit of Proton-ATPase, pp. 1245-1247
Adi Avni; James D. Anderson; Neta Holland; Jean-David Rochaix; Zippora Gromet-Elhanan; Marvin Edelman
The Cloning of a Family of Genes that Encode the Melanocortin Receptors, pp. 1248-1251
Kathleen G. Mountjoy; Linda S. Robbins; Marty T. Mortrud; Roger D. Cone
Target Enzyme Recognition by Calmodulin: 2.4 $\overset{\circ}{\mathrm A}$ Structure of a Calmodulin-Peptide Complex, pp. 1251-1255
William E. Meador; Anthony R. Means; Florante A. Quiocho
Deactivation of Visual Transduction Without Guanosine Triphosphate Hydrolysis by G Protein, pp. 1255-1258
Martha A. Erickson; Phyllis Robinson; John Lisman
The met Proto-Oncogene Receptor and Lumen Formation, pp. 1258-1261
Ilan Tsarfaty; James H. Resau; Shen Rulong; Iafa Keydar; Donna L. Faletto; George F. Vande Woude
Regulation of Protein Serine-Threonine Phosphatase Type-2A by Tyrosine Phosphorylation, pp. 1261-1264
Jian Chen; Bruce L. Martin; David L. Brautigan
Role of βγ Subunits of G Proteins in Targeting the β-Adrenergic Receptor Kinase to Membrane-Bound Receptors, pp. 1264-1267
Julie A. Pitcher; James Inglese; Joyce B. Higgins; Jeffery L. Arriza; Patrick J. Casey; Chong Kim; Jeffery L. Benovic; Madan M. Kwatra; Marc G. Caron; Robert J. Lefkowitz
Requirement for the Adenovirus Type 9 E4 Region in Production of Mammary Tumors, pp. 1267-1271
Ronald Javier; Karel Raska, Jr.; Thomas Shenk
SV2, a Brain Synaptic Vesicle Protein Homologous to Bacterial Transporters, pp. 1271-1273
Sandra M. Bajjalieh; Karen Peterson; Rajesh Shinghal; Richard H. Scheller
Inhibition of Long-Term Potentiation by NMDA-Mediated Nitric Oxide Release, pp. 1273-1276
Yukitoshi Izumi; David B. Clifford; Charles F. Zorumski
Hyperalgesia Mediated by Spinal Glutamate or Substance P Receptor Blocked by Spinal Cyclooxygenase Inhibition, pp. 1276-1279
A. B. Malmberg; T. L. Yaksh
Modulation of Neural Stereoscopic Processing in Primate Area V1 by the Viewing Distance, pp. 1279-1281
Yves Trotter; Simona Celebrini; Brigitte Stricanne; Simon Thorpe; Michel Imbert


Technical Comments
Siderophile Elements and the Earth's Formation, pp. 1281-1285
J. H. Jones; C. J. Capobianco; M. J. Drake; Hugh O'Neill; V. Rama Murthy


Inside AAAS, pp. 1286-1288
Karen Hopkin


Book Reviews
A Statement of Principles, pp. 1290-1291
The Nazi Doctors and the Nuremberg Code. Human Rights and Human Experimentation.
George J. Annas; Michael A. Grodin
Review author[s]: David J. Rothman
Consciousness Redux, pp. 1291-1292
Consciousness Explained.
Daniel C. Dennett
Review author[s]: Dale Purves
Tracking Phytochrome, p. 1292
Pigment of the Imagination. A History of Phytochrome Research.
Linda C. Sage
Review author[s]: Roger P. Hangarter
An Initiation in Physics, p. 1293
Quantum Mechanics.
P. J. E. Peebles
Review author[s]: John L. Challifour
Books Received, pp. 1293-1294


Back Matter (22 pp.)

Previous Issue: New Series, Vol. 257, No. 5073, Aug. 21, 1992
Next Issue: New Series, Vol. 257, No. 5075, Sep. 4, 1992



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