Table of Contents

• Lloyd Demetrius

Demographic Parameters and Natural Selection

• R. B. Guenther,
• C. W. Kerber,
• E. K. Killian,
• K. T. Smith,
• and S. L. Wagner

Reconstruction of Objects from Radiographs and the Location of Brain Tumors

• Denis Gospodarowicz
• and John Moran

Effect of a Fibroblast Growth Factor, Insulin, Dexamethasone, and Serum on the Morphology of BALB/c 3T3 Cells

• Mario R. Capecchi,
• Nancy E. Capecchi,
• Stephen H. Hughes,
• and Geoffrey M. Wahl

Selective Degradation of Abnormal Proteins in Mammalian Tissue Culture Cells

• Robert M. Grainger
• and Norman K. Wessells

Does RNA Pass from Mesenchyme to Epithelium During an Embryonic Tissue Interaction?

• Lester Packer
• and James R. Smith

Extension of the Lifespan of Cultured Normal Human Diploid Cells by Vitamin E

• R. E. Lundquist,
• E. Ehrenfeld,
• and J. V. Maizel, Jr.

Isolation of a Viral Polypeptide Associated with Poliovirus RNA Polymerase

• R. Pollack,
• R. Risser,
• S. Conlon,
• and D. Rifkin

Plasminogen Activator Production Accompanies Loss of Anchorage Regulation in Transformation of Primary Rat Embryo Cells by Simian Virus 40

• V. G. Bieri,
• D. F. H. Wallach,
• and P. S. Lin

Focal Erythrocyte Membrane Perturbations Caused by Nitroxide Lipid Analogues

• R. B. Painter,
• B. R. Young,
• and H. J. Burki

Non-Repairable Strand Breaks Induced by ¹²⁵I Incorporated into Mammalian DNA

• H. J. Smith
• and L. Bogorad

The Polypeptide Subunit Structure of the DNA-dependent RNA Polymerase of Zea mays Chloroplasts

• Richard Nuccitelli
• and Lionel F. Jaffe

Spontaneous Current Pulses Through Developing Fucoid Eggs

• W. Seifert
• and P. S. Rudland

Cyclic Nucleotides and Growth Control in Cultured Mouse Cells: Correlation of Changes in Intracellular 3′:5′cGMP Concentration with a Specific Phase of the Cell Cycle

• M. Samir Amer,
• Allen W. Gomoll,
• James L. Perhach, Jr.,
• Hugh C. Ferguson,
• and Gordon R. McKinney

Aberrations of Cyclic Nucleotide Metabolism in the Hearts and Vessels of Hypertensive Rats

• Gary A. Sega

Unscheduled DNA Synthesis in the Germ Cells of Male Mice Exposed In Vivo to the Chemical Mutagen Ethyl Methanesulfonate

• Manuel Rieber
• and Josefina Bacalao

An “External” RNA Removable from Mammalian Cells by Mild Proteolysis

• Françoise Laval

Endonuclease Activity Associated with Purified PM₂ Bacteriophages

• W. Ostertag,
• G. Roesler,
• C. J. Krieg,
• J. Kind,
• T. Cole,
• T. Crozier,
• G. Gaedicke,
• G. Steinheider,
• N. Kluge,
• and S. Dube

Induction of Endogenous Virus and of Thymidine Kinase by Bromodeoxyuridine in Cell Cultures Transformed by Friend Virus

• Dennis C. Quinlan
• and Joy Hochstadt

An Altered Rate of Uridine Transport in Membrane Vesicles Isolated from Growing and Quiescent Mouse 3T3 Fibroblast Cells

• Goro Eguchi,
• Shin-Ichi Abe,
• and Kenji Watanabe

Differentiation of Lens-Like Structures from Newt Iris Epithelial Cells In Vitro

• E. Lucio Benedetti,
• Irene Dunia,
• and Hans Bloemendal

Development of Junctions During Differentiation of Lens Fibers

• John R. Luckasen,
• James G. White,
• and John H. Kersey

Mitogenic Properties of a Calcium Ionophore, A23187

• Chris W. M. Grant
• and Harden M. McConnell

Glycophorin in Lipid Bilayers

• Haruo Gotoh,
• S. H. Lin,
• and H. Eyring

A Statistical Study of Optical Rotation for Synthetic D,L-Copolypeptide Solutions

• B. Y. Okamoto
• and H. G. Drickamer

High Pressure Studies of Solvent Effects on Anthracene Spectra

• David R. McMillin,
• Robert C. Rosenberg,
• and Harry B. Gray

Preparation and Spectroscopic Studies of Cobalt(II) Derivatives of Blue Copper Proteins

• J. R. Norris,
• H. Scheer,
• M. E. Druyan,
• and J. J. Katz

An Electron-Nuclear Double Resonance (Endor) Study of the Special Pair Model for Photo-Reactive Chlorophyll in Photosynthesis

• Akiko Tanaka
• and Meihan Nonoyama

Latent DNA of Epstein-Barr Virus: Separation from High-Molecular-Weight Cell DNA in a Neutral Glycerol Gradient

• Michael J. Brownstein,
• Juan M. Saavedra,
• Julius Axelrod,
• Gary H. Zeman,
• and David O. Carpenter

Coexistence of Several Putative Neurotransmitters in Single Identified Neurosn of Aplysia

• Stephen R. zukin,
• Anne B. Young,
• and Solomon H. Snyder

Gamma-Aminobutyric Acid Binding to Receptor Sites in the Rat Central Nervous System

• Leonard E. Kelly
• and D. T. Suzuki

The Effects of Increased Temperature on Electroretinograms of Temperature-Sensitive Paralysis Mutants of Drosophila melanogaster

• Vincent F. Castellucci
• and Eric R. Kandel

A Quantal Analysis of the Synaptic Depression Underlying Habituation of the Gill-Withdrawal Reflex in Aplysia

• Osamu Shimomura,
• Frank H. Johnson,
• and Hiroshi Morise

The Aldehyde Content of Luminous Bacteria and of an “Aldehydeless” Dark Mutant

• Sidney M. Hecht,
• Robert D. Faulkner,
• and S. D. Hawrelak

Competitive Inhibition of Beef Heart Cyclic AMP Phosphodiesterase by Cytokinins and Related Compounds

• Michel Goldberg
• and Israel Pecht

Fluorescence Enhancement of Laccase Induced by Reduction of Cu(II) Sites

• James A. Lake,
• Maryanne Pendergast,
• Lawrence Kahan,
• and Masayasu Nomura

Localization of Escherichia coli Ribosomal Proteins S4 and S14 by Electron Microscopy of Antibody-Labeled Subunits

• Mir Shamsuddin,
• R. George Mason,
• James M. Ritchey,
• George R. Honig,
• and Irving M. Klotz

Sites of Acetylation of Sickle Cell Hemoglobin by Aspirin

• José M. Hermoso
• and Wlodzimierz Szer

Replacement of Ribosomal Protein S1 by Interference Factor iα in Ribosomal Binding of Phage MS2 RNA

• Knud H. Nierhaus
• and Ferdinand Dohme

Total Reconstitution of Functionally Active 50S Ribosomal Subunits from Escherichia coli

• Danek Elbaum,
• Ronald L. Nagel,
• Robert M. Bookchin,
• and Theodore T. Herskovits

Effect of Alkylureas on the Polymerization of Hemoglobin S

• Georg Stöffler,
• Ira G. Wool,
• Alan Lin,
• and Karl-Heinz Rak

The Identification of the Eukaryotic Ribosomal Proteins Homologous with Escherichia coli Proteins L7 and L12

• Elias Lazarides
• and Uno Lindberg

Actin Is the Naturally Occurring Inhibitor of Deoxyribonuclease I

• Elliott S. Goldstein,
• Marsha E. Reichman,
• and Sheldon Penman

The Regulation of Protein Synthesis in Mammalian Cells VI. Soluble and Polyribosome Associated Components Controlling In Vitro Polypeptide Initiation in HeLa Cells

• Daniel M. Michaelson
• and Michael A. Raftery

Purified Acetylcholine Receptor: Its Reconstitution to a Chemically Excitable Membrane

• David Tuan-Hua Ho
• and J. E. Varner

Hormonal Control of Messenger Ribonucleic Acid Metabolism in Barley Aleurone Layers

• Noboru Sueoka
• and Joan M. Hammers

Isolation of DNA-Membrane Complex in Bacillus subtilis

• Peter H. Von Hippel,
• Arnold Revzin,
• Carol A. Gross,
• and Amy C. Wang

Non-specific DNA Binding of Genome Regulating Proteins as a Biological Control Mechanism: 1. The lac Operon: Equilibrium Aspects

• Robert P. Lieberman
• and Michio Oishi

The recBC Deoxyribonuclease of Escherichia coli: Isolation and Characterization of the Subunit Proteins and Reconstitution of the Enzyme

• Robert C. Siegel

Biosynthesis of Collagen Crosslinks: Increased Activity of Purified Lysyl Oxidase with Reconstituted Collagen Fibrils

• James F. Hare,
• Kenneth Olden,
• and Eugene P. Kennedy

Heterogeneity of Membrane Vesicles from Escherichia coli and Their Subfractionation with Antibody to ATPase

• Jacqueline Segall,
• Robert Tjian,
• Janice Pero,
• and Richard Losick

Chloramphenicol Restores Sigma Factor Activity to Sporulating Bacillus subtilis

• Young S. Kim,
• Richard Isaacs,
• and Jose M. Perdomo

Alterations of Membrane Glycopeptides in Human Colonic Adenocarcinoma

• Heidrun Matern,
• Marion Hoffmann,
• and Helmut Holzer

Isolation and Characterization of the Carboxypeptidase Y Inhibitor from Yeast

• Janet E. Mertz
• and Paul Berg

Viable Deletion Mutants of Simian Virus 40: Selective Isolation by Means of a Restriction Endonuclease from Hemophilus parainfluenzae

• Ulf Pettersson
• and Lennart Philipson

Synthesis of Complementary RNA Sequences During Productive Adenovirus Infection

• Bernard J. Poiesz,
• Gita Seal,
• and Lawrence A. Loeb

Reverse Transcriptase: Correlation of Zinc Content with Activity

• Peter Reichard,
• Rolf Eliasson,
• and Gunilla Söderman

Initiator RNA in Discontinuous Polyoma DNA Synthesis

• Heinz Wolf,
• Gianni Chinali,
• and Andrea Parmeggiani

Kirromycin, an Inhibitor of Protein Biosynthesis that Acts on Elongation Factor Tu

• Stephen P. Chock
• and Evan Eisenberg

Heavy Meromyosin Mg-ATPase: Presteady-State and Steady-State H⁺ Release

• Yoshimasa Sakakibara
• and Jun-Ichi Tomizawa

Termination Point of Replication of Colicin E1 Plasmid DNA in Cell Extracts

• Richard E. Musso,
• Benoit De Crombrugghe,
• Ira Pastan,
• Jeffrey Sklar,
• Pierre Yot,
• and Sherman Weissman

The 5′-Terminal Nucleotide Sequence of Galactose Messenger Ribonucleic Acid of Escherichia coli

• Donald Yamashiro
• and Choh Hao Li

Synthesis of a Pentekontapeptide with High Lipolytic Activity Corresponding to the Carboxyl-Terminal Fifty Amino Acids of Ovine β-Lipotropin

• Cynthia L. Pon
• and Claudio Gualerzi

Effect of Initiation Factor 3 Binding on the 30S Ribosomal Subunits of Escherichia coli

• S. H. Kim,
• J. L. Sussman,
• F. L. Suddath,
• G. J. Quigley,
• A. McPherson,