Table of Contents

• William H. Taliaferro
• and Philip A. D'Alesandro

Trypanosoma lewisi Infection in the Rat: Effect of Adenine

• Ronald T. Acton,
• Peter F. Weinheimer,
• Shelby J. Hall,
• William Niedermeier,
• Emma Shelton,
• and J. Claude Bennett

Tetrameric Immune Macroglobulins in Three Orders of Bony Fishes

• A. S. Levin,
• H. H. Fudenberg,
• J. E. Hopper,
• S. K. Wilson,
• and A. Nisonoff

Immunofluorescent Evidence for Cellular Control of Synthesis of Variable Regions of Light and Heavy Chains of Immunoglobulins G and M by the Same Gene

• Philip Coffino
• and Matthew D. Scharff

Rate of Somatic Mutation in Immunoglobulin Production by Mouse Myeloma Cells

• O. Gordon Stonington
• and David E. Pettijohn

The Folded Genome of Escherichia coli Isolated in a Protein-DNA-RNA Complex

• Masakazu Hatanaka,
• Robert J. Huebner,
• and Raymond V. Gilden

Specificity of the DNA Product of the C-Type Virus RNA-Dependent DNA Polymerase

• R. Malkin
• and Alan J. Bearden

Primary Reactions of Photosynthesis: Photoreduction of a Bound Chloroplast Ferredoxin at Low Temperature as Detected by EPR Spectroscopy

• Jack Maniloff

Analysis of the Helical Ribosome Structures of Mycoplasma gallisepticum

• Sidney M. Hecht,
• Leslie H. Kirkegaard,
• and Robert M. Bock

Chemical Modifications of Transfer RNA Species. Desulfurization with Raney Nickel

• Pauline Gaskill
• and David Kabat

Unexpectedly Large Size of Globin Messenger Ribonucleic Acid

• M. Ilton,
• A. W. Jevans,
• E. D. McCarthy,
• D. Vance,
• H. B. White, III,
• and Konrad Bloch

Fatty Acid Synthetase Activity in Mycobacterium phlei: Regulation by Polysaccharides

• Stuart A. Newman
• and Stuart A. Rice

Model for Constraint and Control in Biochemical Networks

• Margaret L. Stewart,
• Arthur P. Grollman,
• and Mou-Tuan Huang

Aurintricarboxylic Acid: Inhibitor of Initiation of Protein Synthesis

• John A. Kiger, Jr.
• and Robert L. Sinsheimer

DNA of Vegetative Bacteriophage Lambda, VI Electron Microscopic Studies of Replicating Lambda DNA

• S. Batzri,
• A. Amsterdam,
• Z. Selinger,
• I. Ohad,
• and M. Schramm

Epinephrine-Induced Vacuole Formation in Parotid Gland Cells and Its Independence of the Secretory Process

• Paul Weaver

Temperature-Sensitive Mutations of the Photosynthetic Apparatus of Rhodospirillum rubum

• César A. Chelala,
• Luisa Hirschbein,
• and Héctor N. Torres

Interconvertible Forms of Escherichia coli RNA Polymerase

• A. H. Gelderman,
• A. V. Rake,
• and R. J. Britten

Transcription of Nonrepeated DNA in Neonatal and Fetal Mice

• M. R. Haussler,
• D. W. Boyce,
• E. T. Littledike,
• and H. Rasmussen

A Rapidly Acting Metabolite of Vitamin D 3

• J. Schlom,
• D. H. Harter,
• A. Burny,
• and S. Spiegelman

DNA Polymerase Activities in Virions of Visna Virus, a Causative Agent of a “Slow” Neurological Disease

• Shonen Yoshida
• and Liebe F. Cavalieri

Multiple Molecular Species of Escherichia coli DNA Polymerase

• F. Pochon,
• A. M. Kapuler,
• and A. M. Michelson

Energy Transfer in Modified DNA

• D. G. Blair,
• D. B. Clewell,
• D. J. Sheratt,
• and D. R. Helinski

Strand-Specific Supercoiled DNA-Protein Relaxation Complexes: Comparison of the Complexes of Bacterial Plasmids Col E 1 and Col E 2

• L. Eron,
• R. Arditti,
• G. Zubay,
• S. Connaway,
• and J. R. Beckwith

An Adenosine 3′:5′-Cyclic Monophosphate-Binding Protein That Acts on the Transcription Process

• Michael D. Bick
• and Bernard L. Strehler

Leucyl Transfer RNA Synthetase Changes during Soybean Cotyledon Senescence

• Costante Ceccarini
• and Harry Eagle

pH as a Determinant of Cellular Growth and Contact Inhibition

• John Minna,
• Phillip Nelson,
• John Peacock,
• Devera Glazer,
• and Marshall Nirenberg

Genes for Neuronal Properties Expressed in Neuroblastoma × L Cell Hybrids

• John D. Gearhart
• and Ross J. Macintyre

Lack of Intercellular Suppression of Position-Effect Variegation by Supernumerary Y Chromosomes during Cell Differentiation in Drosophila melanogaster

• John M. Burns
• and F. M. Johnson

Esterase Polymorphism in the Butterfly Hemiargus isola Stability in a Variable Environment

• Fumiko Murayama-Okabayashi,
• Yoshio Okada,
• and Takehiko Tachibana

A Series of Hybrid Cells Containing Different Ratios of Parental Chromosomes Formed by Two Steps of Artificial Fusion

• Mary E. Case
• and Norman H. Giles

Partial Enzyme Aggregates Formed by Pleiotropic Mutants in the arom Gene Cluster of Neurospora crassa

• Toshihisa Kusano,
• Cedric Long,
• and Howard Green

A New Reduced Human-Mouse Somatic Cell Hybrid Containing the Human Gene for Adenine Phosphoribosyltransferase

• O. J. Miller,
• P. R. Cook,
• P. Meera Khan,
• S. Shin,
• and M. Siniscalco

Mitotic Separation of Two Human X-Linked Genes in Man—Mouse Somatic Cell Hybrids

• Jerry A. Schneider
• and Mary C. Weiss

Expression of Differentiated Functions in Hepatoma Cell Hybrids, I. Tyrosine Aminotransferase in Hepatoma-Fibroblast Hybrids

• Drew Schwartz

Dimerization Mutants of Alcohol Dehydrogenase of Maize

• Kay Tanaka,
• Edith M. Miller,
• and Kurt J. Isselbacher

Hypoglycin A: A Specific Inhibitor of Isovaleryl CoA Dehydrogenase

• J. T. Potts, Jr.,
• G. W. Tregear,
• H. T. Keutmann,
• H. D. Niall,
• R. Sauer,
• L. J. Deftos,
• B. F. Dawson,
• M. L. Hogan,
• and G. D. Aurbach

Synthesis of a Biologically Active N-Terminal Tetratriacontapeptide of Parathyroid Hormone

• Jane I. Morton
• and Benjamin V. Siegel

Radiation Sensitivity of New Zealand Black Mice and the Development of Autoimmune Disease and Neoplasia

• R. Curtis Morris, Jr.,
• Elisabeth McSherry,
• and Anthony Sebastian

Modulation of Experimental Renal Dysfunction of Hereditary Fructose Intolerance by Circulating Parathyroid Hormone

• E. C. Franklin
• and B. Frangione

The Molecular Defect in a Protein (CRA) Found in γ1 Heavy Chain Disease, and Its Genetic Implications

• Nancy Lewis Baenziger,
• G. N. Brodie,
• and Philip W. Majerus

A Thrombin-Sensitive Protein of Human Platelet Membranes

• Arthur Z. Eisen,
• Eugene A. Bauer,
• and John J. Jeffrey

Human Skin Collagenase. The Role of Serum Alpha-Globulins in the Control of Activity In Vivo and In Vitro

• Robert E. Edwards,
• Edwin Hewitt,
• and Kenneth A. Ross

Lacunarity for Compact Groups

• A. Hajnal

A Negative Partition Relation

• L. B. Flexner,
• P. Gambetti,
• J. B. Flexner,
• and R. B. Roberts

Studies on Memory: Distribution of Peptidyl-Puromycin in Subcellular Fractions of Mouse Brain

• Eduard Gfeller,
• Michael J. Kuhar,
• and Solomon H. Snyder

Neurotransmitter-Specific Synaptosomes in Rat Corpus Striatum: Morphological Variations *

• Alexander Kolin,
• Julius H. Grollman, Jr.,
• Richard J. Steckel,
• and Harold D. Snow

Determination of Arterial Blood Flow by Percutaneously Introduced Flow Sensors in an External Magnetic Field, II. Implementation of the Method In Vivo

• J. H. Tramezzani,
• E. Morita,
• and Sara R. Chiocchio

The Carotid Body as a Neuroendocrine Organ Involved in Control of Erythropoiesis

• Bernard B. Brodie,
• Watson D. Reid,
• Arthur K. Cho,
• Glenn Sipes,
• Gopal Krishna,
• and James R. Gillette

Possible Mechanism of Liver Necrosis Caused by Aromatic Organic Compounds

• R. Lorente De Nó

Theory of the Voltage Clamp of the Nerve Membrane, I. Ideal Clamp

• B. T. Matthias,
• E. Corenzwit,
• A. S. Cooper,
• and L. D. Longinotti

Instabilities of High Temperature Superconductors

• M. Poe,
• W. D. Phillips,
• J. D. Glickson,
• C. C. McDonald,
• and A. San Pietro

Proton Magnetic Resonance Studies of the Ferredoxins from Spinach and Parsley

• S. H. Lin
• and H. Eyring

Solution of the Time-Dependent Schrödinger Equation by the Laplace Transform Method

• William T. Keeton

Magnets Interfere with Pigeon Homing

• L. William Clem
• and Gerrie A. Leslie

Production of 19S IgM Antibodies with Restricted Heterogeneity from Sharks

• Kirsten H. Walen

Nuclear Involvement Poin xvirus Infection

• Thomas O. Fox,
• John R. Sheppard,
• and Max M. Burger

Cyclic Membrane Changes in Animal Cells: Transformed Cells Permanently Display a Surface Architecture Detected in Normal Cells Only during Mitosis

• Jeanne L. Lovasich,
• Jerzy Neyman,
• Elizabeth L. Scott,
• and Marcella A. Wells

Further Studies of the Whitetop Cloud-Seeding Experiment

• C. L. Pekeris
• and B. Shkoller

Stability of Plane Poiseuille Flow to Periodic Disturbances of Finite Amplitude, II

Possible role of pyrophosphate linkage in the active transport of sodium ions

The time of appearance of cold water off Somalia

Ion transport underlying metabolically controlled volume changes of isolated mitochondrias

Affinity labeling of the heavy and light chains of a myeloma protein with anti-2,4-dinitrophenyl activity