Table of Contents

• Paul P. Trotta,
• Vaira P. Wellner,
• Lawrence M. Pinkus,
• and Alton Meister

Observations on the pH Dependence of the Glutaminase Activity of a Glutamine Amidotransferase, Carbamylphosphate Synthetase

• John P. Reeves,
• Emanuel Shechter,
• Rudolf Weil,
• and H. R. Kaback

Dansyl-Galactoside, a Fluorescent Probe of Active Transport in Bacterial Membrane Vesicles

• Terrell L. Hill

Theory of Muscular Contraction Extended to Groups of Actin Sites

• Ann K. Ganesan

A Method for Detecting Pyrimidine Dimers in the DNA of Bacteria Irradiated with Low Doses of Ultraviolet Light

• David H. Calhoun
• and G. Wesley Hatfield

Autoregulation: A Role for a Biosynthetic Enzyme in the Control of Gene Expression

• Tong Hyub Joh,
• Cathya Geghman,
• and Donald Reis

Immunochemical Demonstration of Increased Accumulation of Tyrosine Hydroxylase Protein in Sympathetic Ganglia and Adrenal Medulla Elicited by Reserpine

• Martin Blumenfeld,
• Allen S. Fox,
• and Hugh S. Forrest

A Family of Three Related Satellite DNAs in Drosophila virilis

• Ronald Merrell
• and Luis Glaser

Specific Recognition of Plasma Membranes by Embryonic Cells

• Helen Oen,
• Maria Pellegrini,
• Dan Eilat,
• and Charles R. Cantor

Identification of 50S Proteins at the Peptidyl-tRNA Binding Site of Escherichia coli Ribosomes

• W. R. Krigbaum
• and Sara Parkey Knutton

Prediction of the Amount of Secondary Structure in a Globular Protein from Its Aminoacid Composition

• Kay T. Elder
• and Alan E. Smith

Methionine Transfer Ribonucleic Acids of Avian Myeloblastosis Virus

• Peter K. Wellauer
• and Igor B. Dawid

Secondary Structure Maps of RNA: Processing of HeLa Ribosomal RNA

• Anne B. Young
• and Solomon H. Snyder

Strychnine Binding Associated with Glycine Receptors of the Central Nervous System

• Paul D. Boyer,
• Richard L. Cross,
• and William Momsen

A New Concept for Energy Coupling in Oxidative Phosphorylation Based on a Molecular Explanation of the Oxygen Exchange Reactions

• Arthur Skoultchi
• and Paul R. Gross

Maternal Histone Messenger RNA: Detection by Molecular Hybridization

• Florante E. Quiocho
• and James W. Thomson

Substrate Binding to an Active Creatine Kinase with a Thiol-Bound Mercurinitrophenol Chromophoric Probe

• Janet R. Horne
• and Volker A. Erdmann

ATPase and GTPase Activities Associated with a Specific 5S RNA-Protein Complex

• Sylvia Lee-Huang,
• Henry Lee,
• and Severo Ochoa

A Specific Inhibitor of Polypeptide-Chain Initiation in Escherichia coli

• D. M. Crothers,
• C. W. Hilbers,
• and R. G. Shulman

Nuclear Magnetic Resonance Study of Hydrogen-Bonded Ring Protons in Watson-Crick Base Pairs

• Rabi Simantov
• and Leo Sachs

Regulation of Acetylcholine Receptors in Relation to Acetylcholinesterase in Neuroblastoma Cells

• J. Y. Le Talaer,
• M. Kermici,
• and Ph. Jeanteur

Isolation of Escherichia coli RNA Polymerase Binding Sites on T5 and T7 DNA: Further Evidence for Sigma-Dependent Recognition of A-T-Rich DNA Sequences

• David A. Schooley,
• Kenneth J. Judy,
• B. John Bergot,
• M. Sharon Hall,
• and John B. Siddall

Biosynthesis of the Juvenile Hormones of Manduca sexta: Labeling Pattern from Mevalonate, Propionate, and Acetate

• William A. Frazier,
• Linda Forrest Boyd,
• and Ralph A. Bradshaw

Interaction of Nerve Growth Factor with Surface Membranes: Biological Competence of Insolubilized Nerve Growth Factor

• Patricia J. Greene
• and Howard H. Sussman

Structural Comparison of Ectopic and Normal Placental Alkaline Phosphatase

• Bacon Ke,
• Raymond E. Hansen,
• and Helmut Beinert

Oxidation-Reduction Potentials of Bound Iron-Sulfur Proteins of Photosystem I

• Lola Margulies
• and Erwin Chargaff

Survey of DNA Polymerase Activity During the Early Development of Drosophila melanogaster

• Morley D. Hollenberg
• and Pedro Cuatrecasas

Epidermal Growth Factor: Receptors in Human Fibroblasts and Modulation of Action by Cholera Toxin

• J. Peisach
• and W. B. Mims

Linear Electric Field-Induced Shifts in Electron Paramagnetic Resonance: A New Method for Study of the Ligands of Cytochrome P-450

• L. I. Fessler,
• R. E. Burgeson,
• N. P. Morris,
• and J. H. Fessler

Collagen Synthesis: A Disulfide-Linked Collagen Precursor in Chick Bone

• Jay N. Umbreit
• and Jack L. Strominger

Relation of Detergent HLB Number to Solubilization and Stabilization of D-Alanine Carboxypeptidase from Bacillus subtilis Membranes

• Leo A. Phillips,
• Vincent W. Hollis, Jr.,
• Robert H. Bassin,
• and Peter J. Fischinger

Characterization of RNA from Noninfectious Virions Produced by Sarcoma Positive-Leukemia Negative Transformed 3T3 Cells

• Honorée Fleming
• and Robert Haselkorn

Differentiation in Nostoc muscorum: Nitrogenase Is Synthesized in Heterocysts

• J. Wolff,
• R. Temple,
• and G. Hope Cook

Stimulation of Steroid Secretion in Adrenal Tumor Cells by Choleragen

• John C. Mauck
• and Howard Green

Regulation of RNA Synthesis in Fibroblasts During Transition from Resting to Growing State

• B. Dharmgrongartama,
• S. P. Mahadik,
• and P. R. Srinivasan

Modification of RNA Polymerase after T3 Phage Infection of Escherichia coli B

• Dieter Oesterhelt
• and Walther Stoeckenius

Functions of a New Photoreceptor Membrane

• Tsunehiro Mukai,
• Kenichi Matsubara,
• and Yasuyuki Takagi

Isolation of Circular DNA Molecules from Whole Cellular DNA by Use of ATP-Dependent Deoxyribonuclease

• Mark C. Willingham,
• Richard A. Carchman,
• and Ira H. Pastan

A Mutant of 3T3 Cells with Cyclic AMP Metabolism Sensitive to Temperature Change

• Ira Goldstein,
• Sylvia Hoffstein,
• John Gallin,
• and Gerald Weissmann

Mechanisms of Lysosomal Enzyme Release from Human Leukocytes: Microtubule Assembly and Membrane Fusion Induced by a Component of Complement

• Dennis Hourcade,
• David Dressler,
• and John Wolfson

The Amplification of Ribosomal RNA Genes Involves a Rolling Circle Intermediate

• M. J. Bissell,
• R. C. White,
• C. Hatie,
• and J. A. Bassham

Dynamics of Metabolism of Normal and Virus-Transformed Chick Cells in Culture

• Harvey D. Preisler,
• David Housman,
• William Scher,
• and Charlotte Friend

Effects of 5-Bromo-2′-Deoxyuridine on Production of Globin Messenger RNA in Dimethyl Sulfoxide-Stimulated Friend Leukemia Cells

• Karen Artzt,
• Philippe Dubois,
• Dorothea Bennett,
• Hubert Condamine,
• Charles Babinet,
• and François Jacob

Surface Antigens Common to Mouse Cleavage Embryos and Primitive Teratocarcinoma Cells in Culture

• George R. Douglas,
• Phyllis J. McAlpine,
• and John L. Hamerton

Regional Localization of Loci for Human PGM 1 and 6PGD on Human Chromosome One by Use of Hybrids of Chinese Hamster-Human Somatic Cells

• Robert T. Garvin,
• Roland Rosset,
• and Luigi Gorini

Ribosomal Assembly Influenced by Growth in the Presence of Streptomycin

• Joseph L. Goldstein
• and Michael S. Brown

Familial Hypercholesterolemia: Identification of a Defect in the Regulation of 3-Hydroxy-3-Methylglutaryl Coenzyme A Reductase Activity Associated with Overproduction of Cholesterol

• Fa-Ten Kao

Identification of Chick Chromosomes in Cell Hybrids Formed Between Chick Erythrocytes and Adenine-Requiring Mutants of Chinese Hamster Cells

• B. N. Apte
• and David Zipser

In Vivo Splicing of Protein: One Continuous Polypeptide from Two Independently Functioning Operons

• D. B. Botkin,
• P. A. Jordan,
• A. S. Dominski,
• H. S. Lowendorf,
• and G. E. Hutchinson

Sodium Dynamics in a Northern Ecosystem

• Michael A. Becker,
• Paul J. Kostel,
• Laurence J. Meyer,
• and J. Edwin Seegmiller

Human Phosphoribosylpyrophosphate Synthetase: Increased Enzyme Specific Activity in a Family with Gout and Excessive Purine Synthesis

• W. Cuatico,
• J.-R. Cho,
• and S. Spiegelman

Particles with RNA of High Molecular Weight and RNA-Directed DNA Polymerase in Human Brain Tumors

• David H. Katz,
• Toshiyuki Hamaoka,
• and Baruj Benacerraf

Induction of Immunological Tolerance in Bone Marrow-Derived Lymphocytes of the IgE Antibody Class

• Pernilla Lindahl,
• Patricia Leary,
• and Ion Gresser

Enhancement by Interferon of the Expression of Surface Antigens on Murine Leukemia L 1210 Cells

• K. Nakamuro,
• N. Tanigaki,
• and D. Pressman

Multiple Common Properties of Human β 2 -Microglobulin and the Common Portion Fragment Derived from HL-A Antigen Molecules

• B. Lisowska-Bernstein,
• A. Rinuy,
• and P. Vassalli

Absence of Detectable IgM in Enzymatically or Biosynthetically Labeled Thymus-Derived Lymphocytes

• James C. Weaver
• and John G. King

The Molecule Microscope: A New Instrument for Biological and Biomedical Research

• Thomas R. Griggs,
• Herbert A. Cooper,
• William P. Webster,
• Robert H. Wagner,
• and K. M. Brinkhous

Plasma Aggregating Factor (Bovine) for Human Platelets: A Marker for Study of Antihemophilic and von Willebrand Factors

• Kent K. Stewart
• and Robert F. Doherty

Resolution of DL-Tryptophan by Affinity Chromatography on Bovine-Serum Albumin-Agarose Columns

• E. R. Kashket
• and T. H. Wilson

Proton-Coupled Accumulation of Galactoside in Streptococcus lactis 7962

• Alice Adams,
• Tomas Lindahl,
• and George Klein

Linear Association Between Cellular DNA and Epstein-Barr Virus DNA in a Human Lymphoblastoid Cell Line

• W. Siegert,
• G. Bauer,
• and P. H. Hofschneider

Direct Evidence for Messenger Activity of Influenza Virion RNA

• Jafa Keydar,
• Zvee Gilead,
• Jacob R. Hartman,
• and Yehuda Ben-Shaul

In Vitro Production of Mouse Mammary Tumor Virus in a Mouse Mammary Tumor Ascites Line

• Jean-Pierre Changeux,
• Philippe Courrége,
• and