Table of Contents

• G. Gamow

DOES GRAVITY CHANGE WITH TIME?

• Irving Segal

POSITIVE-ENERGY PARTICLE MODELS WITH MASS SPLITTING

• Ursula M. Cowgill

HEAT TRANSFER SOLELY BY MOLECULAR CONDUCTION IN THE METALIMNION

• Gordon T. Whyburn

QUASI-CLOSED SETS AND FIXED POINTS

• D. R. Brillinger
• and M. Rosenblatt

ASYMPTOTIC THEORY OF ESTIMATES OF kTH-ORDER SPECTRA

• G. D. Mostow

ON THE RIGIDITY OF HYPERBOLIC SPACE FORMS UNDER QUASI-CONFORMAL MAPPINGS

• H. M. Stark

THERE IS NO TENTH COMPLEX QUADRATIC FIELD WITH CLASS-NUMBER ONE

• M. M. Rao

CONVOLUTIONS OF VECTOR FIELDS AND INTERPOLATION

• Terrell L. Hill

PHASE TRANSITION IN A ONE-DIMENSIONAL SYSTEM

• D. Stanley Tarbell
• and Michael A. Insalaco

THE USE OF t-BUTYLCARBONIC DIETHYLPHOSPHORIC ANHYDRIDE FOR ACYLATING AMINES: A NEW WAY OF PREPARING, t-BUTOXYCARBONYL DERIVATIVES

• Rex Lovrien

THE PHOTOVISCOSITY EFFECT

• Saul G. Cohen
• and Richard M. Schultz

THE ACTIVE SITE IN α-CHYMOTRYPSIN: METHYL 3,4-DIHYDROISOCOUMARIN-3-CARBOXYLATE I

• Yoshimasa Kyogoku,
• R. C. Lord,
• and Alexander Rich

THE EFFECT OF SUBSTITUENTS ON THE HYDROGEN BONDING OF ADENINE AND URACIL DERIVATIVES

• Paul Weiss
• and Yvonne Holland

NEURONAL DYNAMICS AND AXONAL FLOW, II. THE OLFACTORY NERVE AS MODEL TEST OBJECT

• Curt P. Richter,
• Orthello R. Langworthy,
• and Edwards A. Park

AN IDEAL PREPARATION OF ANIMALS (ON SINGLE-FOOD-CHOICE DIET) FOR DISSECTION OF NERVES AND GLANDS AND FOR BONE GROWTH STUDIES

• Patricia V. Northup,
• William S. Hammond,
• and Mariano F. La Via

THE INHIBITION OF SPLENIC RIBONUCLEASE BY LIVER CELL EXTRACT

• Charles M. Radding,
• Josiane Szpirer,
• and René Thomas

THE STRUCTURAL GENE FOR λ EXONUCLEASE

• J. V. Israel,
• Thomas F. Anderson,
• and Myron Levine

in vitro MORPHOGENESIS OF PHAGE P22 FROM HEADS AND BASE-PLATE PARTS

• George Streisinger,
• Joyce Emrich,
• and Mary Morgan Stahl

CHROMOSOME STRUCTURE IN PHAGE T4, III. TERMINAL REDUNDANCY AND LENGTH DETERMINATION

• Charles Yanofsky,
• Gabriel R. Drapeau,
• John R. Guest,
• and Bruce C. Carlton

THE COMPLETE AMINO ACID SEQUENCE OF THE TRYPTOPHAN SYNTHETASE A PROTEIN (α SUBUNIT) AND ITS COLINEAR RELATIONSHIP WITH THE GENETIC MAP OF THE A GENE

• V. Defendi,
• B. Ephrussi,
• H. Koprowski,
• and M. C. Yoshida

PROPERTIES OF HYBRIDS BETWEEN POLYOMA-TRANSFORMED AND NORMAL MOUSE CELLS

• Mark Ptashne

ISOLATION OF THE λ PHAGE REPRESSOR

• J. R. Kates
• and B. R. McAuslan

MESSENGER RNA SYNTHESIS BY A “COATED” VIRAL GENOME

• H. I. Adler,
• W. D. Fisher,
• A. Cohen,
• and Alice A. Hardigree

MINIATURE escherichia coli CELLS DEFICIENT IN DNA

• Charles J. Epstein

CELL SIZE, NUCLEAR CONTENT, AND THE DEVELOPMENT OF POLYPLOIDY IN THE MAMMALIAN LIVER

• Jean-Pierre Changeux,
• Jean Thiéry,
• Yvonne Tung,
• and C. Kittel

ON THE COOPERATIVITY OF BIOLOGICAL MEMBRANES

• Victor Twitty,
• David Grant,
• and Oscar Anderson

INITIAL HOMEWARD ORIENTATION AFTER LONG-DISTANCE DISPLACEMENTS IN THE NEWT TARICHA RIVULARIS

• M. Roman˘uk,
• K. Sláma,
• and F. S˘orm

CONSTITUTION OF A COMPOUND WITH A PRONOUNCED JUVENILE HORMONE ACTIVITY

• G. M. Edelman
• and J. A. Gally

SOMATIC RECOMBINATION OF DUPLICATED GENES: AN HYPOTHESIS ON THE ORIGIN OF ANTIBODY DIVERSITY

• Max M. Burger
• and Allan R. Goldberg

IDENTIFICATION OF A TUMOR-SPECIFIC DETERMINANT ON NEOPLASTIC CELL SURFACES

• K. Dus,
• H. de Klerk,
• R. G. Bartsch,
• T. Horio,
• and M. D. Kamen

ON THE MONOHEME NATURE OF CYTOCHROME c′ (Rhodopseudomonas palustris)

• Louis J. Elsas
• and Leon E. Rosenberg

INHIBITION OF AMINO ACID TRANSPORT IN RAT KIDNEY CORTEX BY PUROMYCIN

• Shutsung Liao
• and Alice H. Lin

PROSTATIC NUCLEAR CHROMATIN: AN EFFECT OF TESTOSTERONE ON THE SYNTHESIS OF RIBONUCLEIC ACID RICH IN CYTIDYLYL(3′,5′)GUANOSINE

• Margarita Salas,
• Merrill B. Hille,
• Jerold A. Last,
• Albert J. Wahba,
• and Severo Ochoa

TRANSLATION OF THE GENETIC MESSAGE, II. EFFECT OF INITIATION FACTORS ON THE BINDING OF FORMYL-METHIONYL-TRNA TO RIBOSOMES

• R. A. Dilley
• and L. P. Vernon

QUANTUM REQUIREMENT OF THE LIGHT-INDUCED PROTON UPTAKE BY SPINACH CHLOROPLASTS

• Robert G. Langdon
• and Howard R. Sloan

FORMATION OF IMINE BONDS BETWEEN TRANSPORTED SUGARS AND LYSYL RESIDUES OF SPECIFIC MEMBRANE PROTEINS OF ERYTHROCYTES AND FAT CELLS

• Elliott Robbins
• and Thaddeus W. Borun

THE CYTOPLASMIC SYNTHESIS OF HISTONES IN HELA CELLS AND ITS TEMPORAL RELATIONSHIP TO DNA REPLICATION

• Robert M. Swenson
• and Milton Kern

THE SYNTHESIS AND SECRETION OF γ-GLOBULINS BY LYMPH NODE CELLS, I. THE MICROSOMAL COMPARTMENTALIZATION OF γ-GLOBULINS

• By A. Adler,
• L. Grossman,
• and G. D. Fasman

SINGLE-STRANDED OLIGOMERS AND POLYMERS OF CYTIDYLIC AND 2′-DEOXYCYTIDYLIC ACIDS: COMPARATIVE OPTICAL ROTATORY STUDIES

• Elliot M. Levine,
• I. Grant Burleigh,
• Charles W. Boone,
• and Harry Eagle

AN ALTERED PATTERN OF RNA SYNTHESIS IN SERIALLY PROPAGATED HUMAN DIPLOID CELLS

• Hiroshi Matsubara,
• Richard M. Sasaki,
• and Richard K. Chain

THE AMINO ACID SEQUENCE OF SPINACH FERREDOXIN

• Walo Leuzinger
• and A. L. Baker

ACETYLCHOLINESTERASE, I. LARGE-SCALE PURIFICATION, HOMOGENEITY, AND AMINO ACID ANALYSIS

• W. Edgar Barnett
• and David H. Brown

MITOCHONDRIAL TRANSFER RIBONUCLEIC ACIDS

• L. L. Labana
• and Henry M. Sobell

BASE-PAIRING CONFIGURATIONS BETWEEN PURINES AND PYRIMIDINES IN THE SOLID STATE: A 2:1 CRYSTALLINE COMPLEX CONTAINING 1-METHYL-5-IODOURACIL AND 9-ETHYL-2,6-DIAMINOPURINE

• Shih Yi Wang,
• Michael H. Patrick,
• A. J. Varghese,
• and Claud S. Rupert

CONCERNING THE MECHANISM OF FORMATION OF UV-INDUCED THYMINE PHOTOPRODUCTS IN DNA

• Donald F. Steiner
• and Philip E. Oyer

THE BIOSYNTHESIS OF INSULIN AND A PROBABLE PRECURSOR OF INSULIN BY A HUMAN ISLET CELL ADENOMA

COMPARISON OF GUANOSINE TRIPHOSPHATE SPLIT AND POLYPEPTIDE SYNTHESIS WITH A PURIFIED E. coli SYSTEM