- J. G. Harrar
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Crises in Human Ecology
PNAS 1968 61: 357-362.
[PDF]
- Ralph A. Alpher and George Gamow
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A Possible Relation between Cosmological Quantities and the Characteristics of Elementary Particles
PNAS 1968 61: 363-366.
[PDF]
- Francis H. Ree and John P. Chan
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Correspondence of Liquid and Gaseous Metals
PNAS 1968 61: 367-374.
[PDF]
- J. P. LaSalle and San Wan
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Optimality and Strong Stability of Control Systems
PNAS 1968 61: 375-377.
[PDF]
- Samuel Eilenberg and Calvin C. Elgot
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Iteration and Recursion
PNAS 1968 61: 378-379.
[PDF]
- Gordon T. Whyburn
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Cut Points in General Topological Spaces
PNAS 1968 61: 380-387.
[PDF]
- Felix E. Browder
-
Nonlinear Monotone and Accretive Operators in Banach Spaces
PNAS 1968 61: 388-393.
[PDF]
- Richard E. Block
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Determination of A+ for the Simple Flexible Algebras
PNAS 1968 61: 394-397.
[PDF]
- J. H. Conway
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A Perfect Group of Order 8,315,553,613,086,720,000 and the Sporadic Simple Groups
PNAS 1968 61: 398-400.
[PDF]
- S. Ogawa, H. M. McConnell, and A. Horwitz
-
Overlapping Conformation Changes in Spin-Labeled Hemoglobin
PNAS 1968 61: 401-405.
[PDF]
- Donella H. Meadows and Oleg Jardetzky
-
Nuclear Magnetic Resonance Studies of the Structure and Binding Sites of Enzymes, IV. Cytidine 3'-Monophosphate Binding to Ribonuclease
PNAS 1968 61: 406-413.
[PDF]
- G. K. Lewis and H. G. Drickamer
-
High-Pressure Mossbauer Resonance Studies of the Conversion of Fe(III) to Fe(II) in Ferric Halides
PNAS 1968 61: 414-421.
[PDF]
- Gert J. Kruger and Jan C. A. Boeyens
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The Crystal and Molecular Structure of the Potassium Salt of 2,2,5,5-tetramethyl-3-carboxypyrroline-1-oxyl
PNAS 1968 61: 422-428.
[PDF]
- F. A. Momany, G. Vanderkooi, and H. A. Scheraga
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Determination of Intermolecular Potentials from Crystal Data, I. General Theory and Application to Crystalline Benzene at Several Temperatures
PNAS 1968 61: 429-436.
[PDF]
- B. Julesz and S. C. Johnson
-
Stereograms Portraying Ambiguously Perceivable Surfaces
PNAS 1968 61: 437-441.
[PDF]
- Frank A. Beach and Ariel Merari
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Coital Behavior in Dogs, IV. Effects of Progesterone in the Bitch
PNAS 1968 61: 442-446.
[PDF]
- R. M. Welch and Emanuel Epstein
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The Dual Mechanisms of Alkali Cation Absorption by Plant Cells: Their Parallel Operation across the Plasmalemma
PNAS 1968 61: 447-453.
[PDF]
- Arthur W. Galston
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Microspectrophotometric Evidence for Phytochrome in Plant Nuclei
PNAS 1968 61: 454-460.
[PDF]
- Ruth V. Dippell
-
The Development of Basal Bodies in Paramecium
PNAS 1968 61: 461-468.
[PDF]
- E. Baltus, J. Hanocq-Quertier, and J. Brachet
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Isolation of Deoxyribonucleic Acid from the Yolk Platelets of Xenopus Laevis Oocyte
PNAS 1968 61: 469-476.
[PDF]
- David Yaffe
-
Retention of Differentiation Potentialities during Prolonged Cultivation of Myogenic Cells
PNAS 1968 61: 477-483.
[PDF]
- Robert E. Lee
-
The Fine Structure of the Cerebroside Occurring in Gaucher's Disease
PNAS 1968 61: 484-489.
[PDF]
- Thomas J. Gill and Heinz W. Kunz
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The Immunogenicity of Vinyl Polymers
PNAS 1968 61: 490-496.
[PDF]
- John L. McGuire and Robert D. Lisk
-
Estrogen Receptors in the Intact Rat
PNAS 1968 61: 497-503.
[PDF]
- Naomi Friedmann and C. R. Park
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Early Effects of 3',5'-Adenosine Monophosphate on the Fluxes of Calcium and Potassium in the Perfused Liver of Normal and Adrenalectomized Rats
PNAS 1968 61: 504-508.
[PDF]
- Attallah Kappas, Chull S. Song, Richard D. Levere, Richard A. Sachson, and S. Granick
-
The Induction of
 -Aminolevulinic Acid Synthetase in vivo in Chick Embryo Liver by Natural Steroids
PNAS 1968 61: 509-513.
[PDF]
- Terrell L. Hill and George M. White
-
On the Sliding-Filament Model of Muscular Contraction, III. Kinetics of Cross-Bridge Fluctuations in Configuration
PNAS 1968 61: 514-521.
[PDF]
- Richard J. Wurtman, Alfred Casper, Larissa A. Pohorecky, and Frederic C. Bartter
-
Impaired Secretion of Epinephrine in Response to Insulin among Hypophysectomized Dogs
PNAS 1968 61: 522-528.
[PDF]
- W. D. Odell and R. S. Swerdloff
-
Progestogen-Induced Luteinizing and Follicle-Stimulating Hormone Surge in Postmenopausal Women: A Simulated Ovulatory Peak
PNAS 1968 61: 529-536.
[PDF]
- R. W. Detroy, D. F. Witz, R. A. Parejko, and P. W. Wilson
-
Reduction of N2 by Complementary Functioning of Two Components from Nitrogen-Fixing Bacteria
PNAS 1968 61: 537-541.
[PDF]
- D. E. Mosier and L. W. Coppleson
-
A Three-Cell Interaction Required for the Induction of the Primary Immune Response in vitro
PNAS 1968 61: 542-547.
[PDF]
- N. A. Young, B. H. Hoyer, and M. A. Martin
-
Polynucleotide Sequence Homologies among Polioviruses
PNAS 1968 61: 548-555.
[PDF]
- G. L. Ada and C. R. Parish
-
Low Zone Tolerance to Bacterial Flagellin in Adult Rats: A Possible Role for Antigen Localized in Lymphoid Follicles
PNAS 1968 61: 556-561.
[PDF]
- Robert DeMars
-
A Temperature-Sensitive Glucose-6-phosphate Dehydrogenase in Mutant Cultured Human Cells
PNAS 1968 61: 562-569.
[PDF]
- L. C. Dunn and Dorothea Bennett
-
A New Case of Transmission Ratio Distortion in the House Mouse
PNAS 1968 61: 570-573.
[PDF]
- Thomas B. Shows and Frank H. Ruddle
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Function of the Lactate Dehydrogenase B Gene in Mouse Erythrocytes: Evidence for Control by a Regulatory Gene
PNAS 1968 61: 574-581.
[PDF]
- John H. Gillespie and Ken-Ichi Kojima
-
The Degree of Polymorphisms in Enzymes Involved in Energy Production Compared to that in Nonspecific Enzymes in Two Drosophila Ananassae Populations
PNAS 1968 61: 582-585.
[PDF]
- Yoel Efron and Drew Schwartz
-
In vivo Inactivation of Maize Alcohol Dehydrogenase by a Two-Factor System
PNAS 1968 61: 586-591.
[PDF]
- A. E. Mirsky, C. J. Burdick, E. H. Davidson, and V. C. Littau
-
The Role of Lysine-Rich Histone in the Maintenance of Chromatin Structure in Metaphase Chromosomes
PNAS 1968 61: 592-597.
[PDF]
- Charles R. Hackenbrock
-
Chemical and Physical Fixation of Isolated Mitochondria in Low-Energy and High-Energy States
PNAS 1968 61: 598-605.
[PDF]
- Linda B. Adair, John Eric Wilson, John W. Zemp, and Edward Glassman
-
Brain Function and Macromolecules, III. Uridine Incorporation into Polysomes of Mouse Brain during Short-Term Avoidance Conditioning
PNAS 1968 61: 606-613.
[PDF]
- N. Nanninga
-
The Conformation of the 50S Ribosomal Subunit of Bacillus Subtilis
PNAS 1968 61: 614-620.
[PDF]
- G. Arrhenius, E. Corenzwit, R. Fitzgerald, G. W. Hull, H. L. Luo, B. T. Matthias, and W. H. Zachariasen
-
Superconductivity of Nb3(Al, Ge) above 20.5 degrees K
PNAS 1968 61: 621-628.
[PDF]
- A. U. Bertland and H. M. Kalckar
-
Reversible Changes of Ordered Polypeptide Structures in Oxidized and Reduced Epimerase
PNAS 1968 61: 629-635.
[PDF]
- Pedro Cuatrecasas, Meir Wilchek, and Christian B. Anfinsen
-
Selective Enzyme Purification by Affinity Chromatography
PNAS 1968 61: 636-643.
[PDF]
- E. H. Eylar and George A. Hashim
-
Allergic Encephalomyelitis: The Structure of the Encephalitogenic Determinant
PNAS 1968 61: 644-650.
[PDF]
- B. Colombo, C. Vesco, and C. Baglioni
-
Role of Ribosomal Subunits in Protein Synthesis in Mammalian Cells
PNAS 1968 61: 651-658.
[PDF]
- P. P. Trotta, P. Dreizen, and A. Stracher
-
Studies on Subfragment-I, a Biologically Active Fragment of Myosin
PNAS 1968 61: 659-666.
[PDF]
- Walter Wehrli, Fritz Knusel, Karl Schmid, and Matthys Staehelin
-
Interaction of Rifamycin with Bacterial RNA Polymerase
PNAS 1968 61: 667-673.
[PDF]
- H. I. Silman and Arthur Karlin
-
Action of Antibiotics Affecting Membrane Permeability on the Electroplax
PNAS 1968 61: 674-679.
[PDF]
- Tomas Lindahl and Gerald M. Edelman
-
Polynucleotide Ligase from Myeloid and Lymphoid Tissues
PNAS 1968 61: 680-687.
[PDF]
- Alfred T. Blomquist, Daniel H. Rich, Victor J. Hruby, Louis L. Nangeroni, Paula Glose, and Vincent Du Vigneaud
-
Deuterated Oxytocins: The Synthesis and Biological Properties of Three Crystalline Analogs of Deamino-oxytocin Deuterated in the 1-ß -Mercaptopropionic Acid Position
PNAS 1968 61: 688-692.
[PDF]
- G. Sundharadas, Jon R. Katze, Dieter Soll, William Konigsberg, and Peter Lengyel
-
On the Recognition of Serine Transfer RNA's Specific for Unrelated Codons by the Same Seryl-Transfer RNA Synthetase
PNAS 1968 61: 693-700.
[PDF]
- Zvi Vogel, Ada Zamir, and David Elson
-
On the Specificity and Stability of an Enzyme that Hydrolyzes N-Substituted Aminoacyl-Transfer RNA's
PNAS 1968 61: 701-707.
[PDF]
- Sheldon R. Pinnell and George R. Martin
-
The Cross-Linking of Collagen and Elastin: Enzymatic Conversion of Lysine in Peptide Linkage to
 -Aminoadipic- -Semialdehyde (Allysine) by an Extract from Bone
PNAS 1968 61: 708-716.
[PDF]
- J. W. Blunt, Yoko Tanaka, and H. F. DeLuca
-
The Biological Activity of 25-hydroxycholecalciferol, a Metabolite of Vitamin D3
PNAS 1968 61: 717-718.
[PDF]
- Arthur P. Grollman and Margaret L. Stewart
-
Inhibition of the Attachment of Messenger Ribonucleic Acid to Ribosomes
PNAS 1968 61: 719-725.
[PDF]
- Sidney Pestka
-
Studies on the Formation of Transfer Ribonucleic Acid-Ribosome Complexes, V. On the Function of a Soluble Transfer Factor in Protein Synthesis
PNAS 1968 61: 726-733.
[PDF]
- Arnold Stern, William A. Gibbons, and Lyman C. Craig
-
A Conformational Analysis of Gramicidin S-A by Nuclear Magnetic Resonance
PNAS 1968 61: 734-741.
[PDF]
- William M. Mitchell
-
A Model for Protein Biosynthesis Predicated on the Concept of Metastable States: A Postulated Role for Genetic Code Degeneracy
PNAS 1968 61: 742-747.
[PDF]
- Raimo Tenhunen, Harvey S. Marver, and Rudi Schmid
-
The Enzymatic Conversion of Heme to Bilirubin by Microsomal Heme Oxygenase
PNAS 1968 61: 748-755.
[PDF]
- John W. Eaton and George J. Brewer
-
The Relationship between Red Cell 2,3-diphosphoglycerate and Levels of Hemoglobin in the Human
PNAS 1968 61: 756-760.
[PDF]
- A. R. Subramanian, Eliora Z. Ron, and Bernard D. Davis
-
A Factor Required for Ribosome Dissociation in Escherichia coli
PNAS 1968 61: 761-767.
[PDF]
- E. Scolnick, R. Tompkins, T. Caskey, and M. Nirenberg
-
Release Factors Differing in Specificity for Terminator Codons
PNAS 1968 61: 768-774.
[PDF]
-
Erratum: A Two-Structure Model for Electrolytic Solutions
PNAS 1968 61: 775.
[PDF]
-
Erratum: Mechanism of DNA Chain Growth, II. Accumulation of Newly Synthesized Short Chains in E. coli Infected with Ligase-Defective T4 Phages
PNAS 1968 61: 775.
[PDF]
-
Erratum: Genetics of Somatic Mammalian Cells, VII. Induction and Isolation of Nutritional Mutants in Chinese Hamster Cells
PNAS 1968 61: 775.
[PDF]
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