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Volume 62(4);  April 1969
The cover of the journal
Biological Sciences: Biochemistry
ON THE MECHANISM OF PEPSIN ACTION
T. Ralph Hollands and Joseph S. Fruton
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1116–1120.
PMCID: PMC223622
NEGATIVE COOPERATIVITY IN REGULATORY ENZYMES
Alexander Levitzki and D. E. Koshland, Jr.
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1121–1128.
PMCID: PMC223623
SOLUBILIZATION OF PARTICULATE PROTEINS AND NONELECTROLYTES BY CHAOTROPIC AGENTS
Y. Hatefi and W. G. Hanstein
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1129–1136.
PMCID: PMC223624
MULTIPLE PHENYLALANYL-TRANSFER RIBONUCLEIC ACID SYNTHETASE ACTIVITIES IN THE CYTOPLASM OF Neurospora crassa
Fredrick J. Kull and K. Bruce Jacobson
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1137–1144.
PMCID: PMC223625
TRANSFER RNA METHYLASES DURING MORPHOGENESIS IN THE CELLULAR SLIME MOLD
David Pillinger and Ernest Borek
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1145–1150.
PMCID: PMC223626
THE MECHANISM OF ACTION OF RIBONUCLEASE
Gordon C. K. Roberts, Edward A. Dennis, Donella H. Meadows, Jack S. Cohen, and Oleg Jardetzky
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1151–1158.
PMCID: PMC223627
SUPERCOILED CIRCULAR DNA-PROTEIN COMPLEX IN Escherichia coli: PURIFICATION AND INDUCED CONVERSION TO AN OPEN CIRCULAR DNA FORM
Don B. Clewell and Donald R. Helinski
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1159–1166.
PMCID: PMC223628
LOCATION OF SINGLE-STRAND INTERRUPTIONS IN THE DNA OF BACTERIOPHAGE T5+
Hermann Bujard
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1167–1174.
PMCID: PMC223629
ANTIBODIES TO ACETYLCHOLINESTERASE
R. Michael Williams
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1175–1180.
PMCID: PMC223630
POLYPEPTIDE CHAIN INITIATION IN E. coli: ISOLATION OF HOMOGENEOUS INITIATION FACTOR F2 AND ITS RELATION TO RIBOSOMAL PROTEINS
Yung-Bog Chae, Rajarshi Mazumder, and Severo Ochoa
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1181–1188.
PMCID: PMC223631
GIANT NUCLEOPLASMIC RNA IN THE SWITCH-ON OF COMPENSATORY RENAL GROWTH
Margherita Willems, Hana A. Musilova, and Ronald A. Malt
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1189–1194.
PMCID: PMC223632
SPIN-LABELED TRANSFER RNA
Brian M. Hoffman, Peter Schofield, and Alexander Rich
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1195–1202.
PMCID: PMC223633
TRANSFER RNA, III. RECONSTITUTION OF ALANINE ACCEPTOR ACTIVITY FROM FRAGMENTS PRODUCED BY SPECIFIC CLEAVAGE OF tRNAAlaII AT ITS ANTICODON
Nobumasa Imura, Harvey Schwam, and Robert W. Chambers
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1203–1209.
PMCID: PMC223634
REGULATORY EFFECTS OF SUBSTRATES ON A PHOSPHOTRANSFERASE FROM Aerobacter aerogenes AND THE MODIFICATION OF ITS ACTIVITY BY PARTIAL PROTEOLYSIS
S. Schaefler and I. Schenkein
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1210–1217.
PMCID: PMC223635
THE INTERACTION OF RNA POLYMERASE WITH HISTONES
Thomas C. Spelsberg, Sharon Tankersley, and Lubomir S. Hnilica
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1218–1225.
PMCID: PMC223636
ISOLATION OF A CHLORAMPHENICOL-RESISTANT PROTEIN FROM λ-INFECTED CELLS
Arnold J. Levine and Robert L. Sinsheimer
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1226–1228.
PMCID: PMC223637
LEUCINE tRNA AND CESSATION OF Escherichia coli PROTEIN SYNTHESIS UPON PHAGE T2 INFECTION
Tamiko Kano-Sueoka and Noboru Sueoka
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1229–1236.
PMCID: PMC223638
Biological Sciences: Botany
INTERFERENCE OF MOONLIGHT WITH THE PHOTOPERIODIC MEASUREMENT OF TIME BY PLANTS, AND THEIR ADAPTIVE REACTION
Erwin Bünning and Ilse Moser
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1018–1022.
PMCID: PMC223607
Biological Sciences: Genetics
HYBRIDIZATION OF TWO BIOCHEMICALLY MARKED HUMAN CELL LINES
Selma Silagi, Gretchen Darlington, and Sarah A. Bruce
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1085–1092.
PMCID: PMC223618
EVENTS OCCURRING DURING THE REPLICATION OF BACTERIOPHAGE T4 DNA
Paul D. Scotti
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1093–1099.
PMCID: PMC223619
THE L-ARABINOSE OPERON IN Escherichia coli B/r: A GENETIC DEMONSTRATION OF TWO FUNCTIONAL STATES OF THE PRODUCT OF A REGULATOR GENE
Ellis Englesberg, Craig Squires, and Frank Meronk, Jr.
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1100–1107.
PMCID: PMC223620
HEPATITIS AND AUSTRALIA ANTIGEN: AUTOSOMAL RECESSIVE INHERITANCE OF SUSCEPTIBILITY TO INFECTION IN HUMANS
B. S. Blumberg, J. S. Friedlaender, Anita Woodside, A. I. Sutnick, and W. T. London
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1108–1115.
PMCID: PMC223621
Biological Sciences: Medical Sciences
SURFACE-SPECIFIC CHARACTERISTICS OF A CONTACT-INHIBITED CELL LINE CONTAINING THE SV40 VIRAL GENOME
Robert E. Pollack and Max M. Burger
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1074–1076.
PMCID: PMC223616
COMPLEX MITOCHONDRIAL DNA IN LEUKEMIC AND NORMAL HUMAN MYELOID CELLS
David A. Clayton and Jerome Vinograd
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1077–1084.
PMCID: PMC223617
Biological Sciences: Microbiology
FURTHER STUDIES ON THE ROLE OF CIRCULATING LYMPHOCYTES IN THE INITIATION OF PRIMARY ANTIBODY RESPONSES TO DIFFERENT ANTIGENS
S. Strober and L. W. Law
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1023–1030.
PMCID: PMC223608
“RESCUED” SV40: INCREASED TRANSFORMING EFFICIENCY IN MOUSE AND HUMAN CELLS
George J. Todaro and Kenneth K. Takemoto
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1031–1037.
PMCID: PMC223609
THE ROLE OF INDIVIDUAL SPLEEN CELLS IN THE INTERFERON RESPONSE OF THE INTACT MOUSE
June E. Osborn and Duard L. Walker
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1038–1045.
PMCID: PMC223610
VIRUS-INDUCED SARCOMA OF MICE: INHIBITION BY A SYNTHETIC POLYRIBONUCLEOTIDE COMPLEX
Padman S. Sarma, Grace Shiu, Russell H. Neubauer, Samuel Baron, and Robert J. Huebner
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1046–1051.
PMCID: PMC223611
Biological Sciences: Physiology
OLFACTORY BULB REMOVAL: EFFECTS ON BRAIN NOREPINEPHRINE
Larissa A. Pohorecky, Michael J. Zigmond, Lennart Heimer, and Richard J. Wurtman
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1052–1055.
PMCID: PMC223612
Biological Sciences: Zoology
ON POPULATION GROWTH IN A RANDOMLY VARYING ENVIRONMENT
R. C. Lewontin and D. Cohen
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1056–1060.
PMCID: PMC223613
THE EFFECT OF RANDOM VARIATIONS OF DIFFERENT TYPES ON POPULATION GROWTH
R. Levins
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1061–1065.
PMCID: PMC223614
DEVELOPMENTAL PHASES OF THE BIOCOENOSIS
Clyde E. Goulden
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1066–1073.
PMCID: PMC223615
Physical Sciences: Chemistry
TOTAL SYNTHESIS OF THE RACEMIC FORM OF THE SECOND JUVENILE HORMONE (METHYL 12-HOMOJUVENATE) FROM THE CECROPIA SILK MOTH
William S. Johnson, Simon F. Campbell, A. Krishnakumaran, and Andre S. Meyer
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1005–1009.
PMCID: PMC223604
Physical Sciences: Mathematics
TRANSLATION OPERATORS ON THE HALF-LINE
L. A. Coburn and R. G. Douglas
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1010–1013.
PMCID: PMC223605
SCHWARZ'S LEMMA IN NORMED LINEAR SPACES
Lawrence A. Harris
Proc Natl Acad Sci U S A. 1969 April; 62(4): 1014–1017.
PMCID: PMC223606
Journal Matter
Original table of contents page
Administrative content — journal masthead, notices, indexes, etc.
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