Table of Contents

• Rudolf H. Andreatta,
• Ronald K. H. Liem,
• and Harold A. Scheraga

Mechanism of Action of Thrombin on Fibrinogen, I. Synthesis of Fibrinogen-like Peptides, and Their Proteolysis by Thrombin and Trypsin

• Irving M. Klotz,
• Garfield P. Royer,
• and Ioannis S. Scarpa

Synthetic Derivatives of Polyethyleneimine with Enzyme-Like Catalytic Activity (Synzymes)

• W. F. Libby

Terrestrial and Meteorite Carbon Appear to Have the Same Isotopic Composition

• S. H. Lin
• and H. Eyring

Calculation of the Reaction Cross Section from a Rate Constant by the Method of Steepest-Descent

• Keith A. Kvenvolden,
• James G. Lawless,
• and Cyril Ponnamperuma

Nonprotein Amino Acids in the Murchison Meteorite

• Irene M. Voynick
• and Joseph S. Fruton

The Comparative Specificity of Acid Proteinases

• Lawrence Skogerson,
• Donald Roufa,
• and Philip Leder

Characterization of the Initial Peptide of Qβ RNA Polymerase and Control of Its Synthesis

• M. R. Rifkin
• and D. J. L. Luck

Defective Production of Mitochondrial Ribosomes in the Poky Mutant of Neurospora crassa

• A. Halbreich
• and M. Rabinowitz

Isolation of Saccharomyces cerevisiae Mitochondrial Formyltetrahydrofolic Acid:Methionyl-tRNA Transformylase and the Hybridization of Mitochondrial fMet-tRNA with Mitochondrial DNA

• G. S. P. Groot,
• L. Kováč,
• and G. Schatz

Promitochondria of Anaerobically Grown Yeast, V. Energy Transfer in the Absence of an Electron Transfer Chain

• J. Selhub,
• M. A. Savin,
• W. Sakami,
• and M. Flavin

Synchronization of Converging Metabolic Pathways: Activation of the Cystathionine γ-Synthase of Neurospora crassa by Methyltetrahydrofolate

• Marvin D. Siperstein,
• Ann M. Gyde,
• and Harold P. Morris

Loss of Feedback Control of Hydroxymethylglutaryl Coenzyme A Reductase in Hepatomas

• Jerry S. Dubnoff
• and Umadas Maitra

Isolation and Properties of Polypeptide Chain Initiation Factor FII from Escherichia coli: Evidence for a Dual Function

• Paul A. Horgen
• and David H. Griffin

Specific Inhibitors of the Three RNA Polymerases from the Aquatic Fungus Blastocladiella emersonii

• Abraham W. Hsie
• and Theodore T. Puck

Morphological Transformation of Chinese Hamster Cells by Dibutyryl Adenosine Cyclic 3′:5′-Monophosphate and Testosterone

• Stanton Segal,
• Claire Rea,
• and Inez Smith

Separate Transport Systems for Sugars and Amino Acids in Developing Rat Kidney Cortex

• Yuriy M. Sivolap
• and James Bonner

Association of Chromosomal RNA with Repetitive DNA

• Günter Blobel
• and David Sabatini

Dissociation of Mammalian Polyribosomes into Subunits by Puromycin

• Jonathan Dembitz Berman
• and Michael Young

Rapid and Complete Purification of Acetylcholinesterases of Electric Eel and Erythrocyte by Affinity Chromatography

• Sylvia J. Kerr

Absence of a Natural Inhibitor of the tRNA Methylases from Fetal and Tumor Tissues

• Bernard W. Agranoff
• and Amiya K. Hajra

The Acyl Dihydroxyacetone Phosphate Pathway for Glycerolipid Biosynthesis in Mouse Liver and Ehrlich Ascites Tumor Cells

• L. C. Davis,
• G. Ribereau-Gayon,
• and B. L. Horecker

Photoinactivation of Aldolases by Pyridoxal Phosphate and Its Analogues

• George S. Johnson,
• Robert M. Friedman,
• and Ira Pastan

Restoration of Several Morphological Characteristics of Normal Fibroblasts in Sarcoma Cells Treated with Adenosine-3′:5′-Cyclic Monophosphate and Its Derivatives

• Anne M. Haywood

Cellular Site of Escherichia coli Ribosomal RNA Synthesis

• Breck Byers

Chick Embryo Ribosome Crystals: Analysis of Bonding and Functional Activity In Vitro

• Victor J. Hruby,
• A. I. Brewster,
• and J. A. Glasel

NMR Studies on the Conformation of Derivatives of the Side Chain of Oxytocin: Examples of cis-trans Isomerism

• Don L. Layman,
• Ermona B. McGoodwin,
• and George R. Martin

The Nature of the Collagen Synthesized by Cultured Human Fibroblasts

• Harry Roy
• and Evangelos N. Moudrianakis

Interactions between ADP and the Coupling Factor of Photophosphorylation

• Ming-Jer Tsai,
• Georg Michaelis,
• and R. S. Criddle

DNA-Dependent RNA Polymerase from Yeast Mitochondria

• M. Philipp
• and M. L. Bender

Inhibition of Serine Proteases by Arylboronic Acids

• Margaret E. Morris
• and Hannah Gould

Reinitiation of RNA Synthesis on Transcription of Chromatin DNA by Escherichia coli RNA Polymerase

• Mirko Beljanski,
• Pierre Bourgarel,
• and Monique Beljanski

Drastic Alteration of Ribosomal RNA and Ribosomal Proteins in Showdomycin-Resistant Escherichia coli

• David A. Shafritz,
• David G. Laycock,
• and W. French Anderson

Puromycin-Peptide Bond Formation with Reticulocyte Initiation Factors M₁ and M₂

• Michael Schonberg,
• Samuel C. Silverstein,
• Daniel H. Levin,
• and George Acs

Asynchronous Synthesis of the Complementary Strands of the Reovirus Genome

• Gisela Wohlrab Charlang
• and N. H. Horowitz

Germination and Growth of Neurospora at Low Water Activities

• Michael N. Oxman
• and Myron J. Levin

Interferon and Transcription of Early Virus-Specific RNA in Cells Infected with Simian Virus 40

• Alfred L. Goldberg

A Role of Aminoacyl-tRNA in the Regulation of Protein Breakdown in Escherichia coli

• Leonard Mindich

Induction of Staphylococcus aureus Lactose Permease in the Absence of Glycerolipid Synthesis

• Thomas Cline
• and J. W. Hastings

Temperature-Sensitive Mutants of Bioluminescent Bacteria

• Robert D. Simon

Cyanophycin Granules from the Blue-Green Alga Anabaena cylindrica: A Reserve Material Consisting of Copolymers of Aspartic Acid and Arginine

• William J. Robbins
• and Annette Hervery

Cytokinin and Growth of Excised Roots of Bryophyllum calycinum

• D. R. Soll
• and D. R. Sonneborn

Zoospore Germination in Blastocladiella emersonii: Cell Differentiation without Protein Synthesis?

• Yuichiro Hiraizumi

Spontaneous Recombination in Drosophila melanogaster Males

• Walter Eckhart,
• Renato Dulbecco,
• and Max M. Burger

Temperature-Dependent Surface Changes in Cells Infected or Transformed by a Thermosensitive Mutant of Polyoma Virus

• H. Morimoto
• and H. O. Halvorson

Characterization of Mitochondrial Ribosomes from Yeast

• Curt Stern
• and Chiyoko Tokunaga

On Cell Lethals in Drosophila

• Allen S. Fox,
• Sei Byung Yoon,
• and William M. Gelbart

DNA-Induced Transformation in Drosophila: Genetic Analysis of Transformed Stocks

• Erwin Goldberg

Immunochemical Specificity of Lactate Dehydrogenase-X

• B. G. Brackett,
• W. Baranska,
• W. Sawicki,
• and H. Koprowski

Uptake of Heterologous Genome by Mammalian Spermatozoa and Its Transfer to Ova through Fertilization

• Ching-Hsiang Su
• and Ronald C. Greene

Regulation of Methionine Biosynthesis in Escherichia coli: Mapping of the metJ Locus and Properties of a metJ⁺/metJ^- Diploid

• Samuel D. Balk

Calcium as a Regulator of the Proliferation of Normal, but Not of Transformed, Chicken Fibroblasts in a Plasma-Containing Medium

• Bertil Hille

The Hydration of Sodium Ions Crossing the Nerve Membrane

• Sarah Fryer Leibowitz

Hypothalamic Alpha- and Beta-Adrenergic Systems Regulate Both Thirst and Hunger in the Rat

• Thomas H. Jordan
• and Joel N. Franklin

Optimal Solutions to a Linear Inverse Problem in Geophysics

• Nicola Di Ferrante,
• Buford L. Nichols,
• Patricia V. Donnelly,
• Giovanni Neri,
• Ruzica Hrgovcic,
• and Robert K. Berglund

Induced Degradation of Glycosaminoglycans in Hurler's and Hunter's Syndromes by Plasma Infusion

• Daniel S. Feldman,
• Richard D. Levere,
• James S. Lieberman,
• Ruth A. Cardinal,
• and C. J. Watson

Presynaptic Neuromuscular Inhibition by Porphobilinogen and Porphobilin

• Aaron E. Freeman,
• Paul J. Price,
• Robert J. Bryan,
• Robert J. Gordon,
• Raymond V. Gilden,
• Gary J. Kelloff,
• and Robert J. Huebner

Transformation of Rat and Hamster Embryo Cells by Extracts of City Smog

• Paul A. Samuelson

Stochastic Speculative Price

• Charlotte Friend,
• William Scher,
• J. G. Holland,
• and Toru Sato

Hemoglobin Synthesis in Murine Virus-Induced Leukemic Cells In Vitro: Stimulation of Erythroid Differentiation by Dimethyl Sulfoxide

• Francis D. Murnaghan

The Characters of the Symmetric Group

• Joseph M. Davie,
• William E. Paul,
• Rose G. Mage,
• and Margaret B. Goldman

Membrane-Associated Immunoglobulin of Rabbit Peripheral Blood Lymphocytes: Allelic Exclusion at the b Locus

• William J. Martin,
• John R. Wunderlich,
• Freeman Fletcher,
• and John K. Inman

Enhanced Immunogenicity of Chemically-Coated Syngeneic Tumor Cells

The π-cation radical of chlorophyll a

Revised identification of the chromophore of a cell division factor from crown gall tumor cells of Vinca rosea L

Nuclear involvement in poxvirus infection