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Volume 61(2);  October 1968
The cover of the journal
Crises in human ecology.
J G Harrar
Proc Natl Acad Sci U S A. 1968 October; 61(2): 357–362.
PMCID: PMC225163
A POSSIBLE RELATION BETWEEN COSMOLOGICAL QUANTITIES AND THE CHARACTERISTICS OF ELEMENTARY PARTICLES
Ralph A. Alpher and George Gamow
Proc Natl Acad Sci U S A. 1968 October; 61(2): 363–366.
PMCID: PMC225164
CORRESPONDENCE OF LIQUID AND GASEOUS METALS
Francis H. Ree and John P. Chan
Proc Natl Acad Sci U S A. 1968 October; 61(2): 367–374.
PMCID: PMC225165
OPTIMALITY AND STRONG STABILITY OF CONTROL SYSTEMS
J. P. LaSalle and San Wan
Proc Natl Acad Sci U S A. 1968 October; 61(2): 375–377.
PMCID: PMC225166
ITERATION AND RECURSION
Samuel Eilenberg and Calvin C. Elgot
Proc Natl Acad Sci U S A. 1968 October; 61(2): 378–379.
PMCID: PMC225167
CUT POINTS IN GENERAL TOPOLOGICAL SPACES
Gordon T. Whyburn
Proc Natl Acad Sci U S A. 1968 October; 61(2): 380–387.
PMCID: PMC225168
NONLINEAR MONOTONE AND ACCRETIVE OPERATORS IN BANACH SPACES
Felix E. Browder
Proc Natl Acad Sci U S A. 1968 October; 61(2): 388–393.
PMCID: PMC225169
DETERMINATION OF A+ FOR THE SIMPLE FLEXIBLE ALGEBRAS
Richard E. Block
Proc Natl Acad Sci U S A. 1968 October; 61(2): 394–397.
PMCID: PMC225170
A PERFECT GROUP OF ORDER 8,315,553,613,086,720,000 AND THE SPORADIC SIMPLE GROUPS
J. H. Conway
Proc Natl Acad Sci U S A. 1968 October; 61(2): 398–400.
PMCID: PMC225171
Overlapping conformation changes in spin-labeled hemoglobin.
S Ogawa, H M McConnell, and A Horwitz
Proc Natl Acad Sci U S A. 1968 October; 61(2): 401–405.
PMCID: PMC225172
Nuclear magnetic resonance studies of the structure and binding sites of enzymes. IV. Cytidine 3'-monophosphate binding to ribonuclease.
D H Meadows and O Jardetzky
Proc Natl Acad Sci U S A. 1968 October; 61(2): 406–413.
PMCID: PMC225173
HIGH-PRESSURE MÖSSBAUER RESONANCE STUDIES OF THE CONVERSION OF Fe(III) TO Fe(II) IN FERRIC HALIDES
G. K. Lewis, Jr. and H. G. Drickamer
Proc Natl Acad Sci U S A. 1968 October; 61(2): 414–421.
PMCID: PMC225174
THE CRYSTAL AND MOLECULAR STRUCTURE OF THE POTASSIUM SALT OF 2,2,5,5-TETRAMETHYL-3-CARBOXYPYRROLINE-1-OXYL
Gert J. Kruger and Jan C. A. Boeyens
Proc Natl Acad Sci U S A. 1968 October; 61(2): 422–428.
PMCID: PMC225175
THE DETERMINATION OF INTERMOLECULAR POTENTIALS FROM CRYSTAL DATA, I. GENERAL THEORY AND APPLICATION TO CRYSTALLINE BENZENE AT SEVERAL TEMPERATURES
F. A. Momany, G. Vanderkooi, and H. A. Scheraga
Proc Natl Acad Sci U S A. 1968 October; 61(2): 429–436.
PMCID: PMC225176
Stereograms portraying ambiguously perceivable surfaces.
B Julesz and S C Johnson
Proc Natl Acad Sci U S A. 1968 October; 61(2): 437–441.
PMCID: PMC225177
Coital behavior in dogs. IV. Effects of progesterone in the bitch.
F A Beach and A Merari
Proc Natl Acad Sci U S A. 1968 October; 61(2): 442–446.
PMCID: PMC225178
THE DUAL MECHANISMS OF ALKALI CATION ABSORPTION BY PLANT CELLS: THEIR PARALLEL OPERATION ACROSS THE PLASMALEMMA
R. M. Welch and Emanuel Epstein
Proc Natl Acad Sci U S A. 1968 October; 61(2): 447–453.
PMCID: PMC225179
MICROSPECTROPHOTOMETRIC EVIDENCE FOR PHYTOCHROME IN PLANT NUCLEI
Arthur W. Galston
Proc Natl Acad Sci U S A. 1968 October; 61(2): 454–460.
PMCID: PMC225180
The development of basal bodies in paramecium.
R V Dippell
Proc Natl Acad Sci U S A. 1968 October; 61(2): 461–468.
PMCID: PMC225181
Isolation of deoxyribonucleic acid from the yolk platelets of Xenopus laevis oöcyte.
E Baltus, J Hanocq-Quertier, and J Brachet
Proc Natl Acad Sci U S A. 1968 October; 61(2): 469–476.
PMCID: PMC225182
Retention of differentiation potentialities during prolonged cultivation of myogenic cells.
D Yaffe
Proc Natl Acad Sci U S A. 1968 October; 61(2): 477–483.
PMCID: PMC225183
The fine structure of the cerebroside occurring in Gaucher's disease.
R E Lee
Proc Natl Acad Sci U S A. 1968 October; 61(2): 484–489.
PMCID: PMC225184
The immunogenicity of vinyl polymers.
T J Gill, 3rd and H W Kunz
Proc Natl Acad Sci U S A. 1968 October; 61(2): 490–496.
PMCID: PMC225185
Estrogen receptors in the intact rat.
J L McGuire and R D Lisk
Proc Natl Acad Sci U S A. 1968 October; 61(2): 497–503.
PMCID: PMC225186
Early effects of 3',5'-adenosine monophosphate on the fluxes of calcium end potassium in the perfused liver of normal and adrenalectomized rats.
N Friedmann and C R Park
Proc Natl Acad Sci U S A. 1968 October; 61(2): 504–508.
PMCID: PMC225187
THE INDUCTION OF δ-AMINOLEVULINIC ACID SYNTHETASE in vivo IN CHICK EMBRYO LIVER BY NATURAL STEROIDS
Attallah Kappas, Chull S. Song, Richard D. Levere, Richard A. Sachson, and S. Granick
Proc Natl Acad Sci U S A. 1968 October; 61(2): 509–513.
PMCID: PMC225188
On the sliding-filament model of muscular contraction. 3. Kinetics of cross-bridge fluctuations in configuration.
T L Hill and G M White
Proc Natl Acad Sci U S A. 1968 October; 61(2): 514–521.
PMCID: PMC225189
Impaired secretion of epinephrine in response to insulin among hypophysectomized dogs.
R J Wurtman, A Casper, L A Pohorecky, and F C Bartter
Proc Natl Acad Sci U S A. 1968 October; 61(2): 522–528.
PMCID: PMC225190
Progestogen-induced luteinizing and follicle-stimulating hormone surge in postmenopausal women: a simulated ovulatory peak.
W D Odell and R S Swerdloff
Proc Natl Acad Sci U S A. 1968 October; 61(2): 529–536.
PMCID: PMC225191
Reduction of N2 by complementary functioning of two components from nitrogen-fixing bacteria.
R W Detroy, D F Witz, R A Parejko, and P W Wilson
Proc Natl Acad Sci U S A. 1968 October; 61(2): 537–541.
PMCID: PMC225192
A THREE-CELL INTERACTION REQUIRED FOR THE INDUCTION OF THE PRIMARY IMMUNE RESPONSE in vitro
D. E. Mosier and L. W. Coppleson
Proc Natl Acad Sci U S A. 1968 October; 61(2): 542–547.
PMCID: PMC225193
Polynucleotide sequence homologies among polioviruses.
N A Young, B H Hoyer, and M A Martin
Proc Natl Acad Sci U S A. 1968 October; 61(2): 548–555.
PMCID: PMC225194
Low zone tolerance to bacterial flagellin in adult rats: a possible role for antigen localized in lymphoid follicles.
G L Ada and C R Parish
Proc Natl Acad Sci U S A. 1968 October; 61(2): 556–561.
PMCID: PMC225195
A temperature-sensitive glucose-6-phosphate dehydrogenase in mutant cultured human cells.
R DeMars
Proc Natl Acad Sci U S A. 1968 October; 61(2): 562–569.
PMCID: PMC225196
A new case of transmission ratio distortion in the house mouse.
L C Dunn and D Bennett
Proc Natl Acad Sci U S A. 1968 October; 61(2): 570–573.
PMCID: PMC225197
Function of the lactate dehydrogenase B gene in mouse erythrocytes: evidence for control by a regulatory gene.
T B Shows and F H Ruddle
Proc Natl Acad Sci U S A. 1968 October; 61(2): 574–581.
PMCID: PMC225198
The degree of polymorphisms in enzymes involved in energy production compared to that in nonspecific enzymes in two Drosophila ananassae populations.
J H Gillespie and K Kojima
Proc Natl Acad Sci U S A. 1968 October; 61(2): 582–585.
PMCID: PMC225199
In vivo inactivation of maize alcohol dehydrogenase by a two-factor system.
Y Efron and D Schwartz
Proc Natl Acad Sci U S A. 1968 October; 61(2): 586–591.
PMCID: PMC225200
The role of lysine-rich histone in the maintenance of chromatin structure in metaphase chromosomes.
A E Mirsky, C J Burdick, E H Davidson, and V C Littau
Proc Natl Acad Sci U S A. 1968 October; 61(2): 592–597.
PMCID: PMC225201
Chemical and physical fixation of isolated mitochondria in low-energy and high-energy states.
C R Hackenbrock
Proc Natl Acad Sci U S A. 1968 October; 61(2): 598–605.
PMCID: PMC225202
Brain function and macromolecules. 3. Uridine incorporation into polysomes of mouse brain during short-term avoidance conditioning.
L B Adair, J E Wilson, J W Zemp, and E Glassman
Proc Natl Acad Sci U S A. 1968 October; 61(2): 606–613.
PMCID: PMC225203
The conformation of the 50S ribosomal subunit of Bacillus subtilis.
N Nanninga
Proc Natl Acad Sci U S A. 1968 October; 61(2): 614–620.
PMCID: PMC225204
SUPERCONDUCTIVITY OF NB3(AL, GE) ABOVE 20.5°K
G. Arrhenius, E. Corenzwit, R. Fitzgerald, G. W. Hull, Jr., H. L. Luo, B. T. Matthias, and W. H. Zachariasen
Proc Natl Acad Sci U S A. 1968 October; 61(2): 621–628.
PMCID: PMC225205
Reversible changes of ordered polypeptide structures in oxidized and reduced epimerase.
A U Bertland, 2nd and H M Kalckar
Proc Natl Acad Sci U S A. 1968 October; 61(2): 629–635.
PMCID: PMC225206
Selective enzyme purification by affinity chromatography.
P Cuatrecasas, M Wilchek, and C B Anfinsen
Proc Natl Acad Sci U S A. 1968 October; 61(2): 636–643.
PMCID: PMC225207
Allergic encephalomyelitis: the structure of encephalitogenic determinant.
E H Eylar and G A Hashim
Proc Natl Acad Sci U S A. 1968 October; 61(2): 644–650.
PMCID: PMC225208
Role of ribosomal subunits in protein synthesis in mammalian cells.
B Colombo, C Vesco, and C Baglioni
Proc Natl Acad Sci U S A. 1968 October; 61(2): 651–658.
PMCID: PMC225209
Studies on subfragment-I, a biologically active fragment of myosin.
P P Trotta, P Dreizen, and A Stracher
Proc Natl Acad Sci U S A. 1968 October; 61(2): 659–666.
PMCID: PMC225210
Interaction of rifamycin with bacterial RNA polymerase.
W Wehrli, F Knüsel, K Schmid, and M Staehelin
Proc Natl Acad Sci U S A. 1968 October; 61(2): 667–673.
PMCID: PMC225211
Action of antibiotics affecting membrane permeability on the electroplax.
H I Silman and A Karlin
Proc Natl Acad Sci U S A. 1968 October; 61(2): 674–679.
PMCID: PMC225212
Polynucleotide ligase from myeloid and lymphoid tissues.
T Lindahl and G M Edelman
Proc Natl Acad Sci U S A. 1968 October; 61(2): 680–687.
PMCID: PMC225213
Deuterated oxytocins: the synthesis and biological properties of three crystalline analogs of deamino-oxytocin deuterated in the 1-beta-mercaptopropionic acid position.
A T Blomquist, D H Rich, V J Hruby, L L Nangeroni, P Glose, and V Du Vigneaud
Proc Natl Acad Sci U S A. 1968 October; 61(2): 688–692.
PMCID: PMC225214
On the recognition of serine transfer RNA's specific for unrelated codons by the same seryl-transfer RNA synthetase.
G Sundharadas, J R Katze, D Söll, W Konigsberg, and P Lengyel
Proc Natl Acad Sci U S A. 1968 October; 61(2): 693–700.
PMCID: PMC225215
On the specificity and stability of an enzyme that hydrolyzes N-substituted aminoacyl-transfer RNA's.
Z Vogel, A Zamir, and D Elson
Proc Natl Acad Sci U S A. 1968 October; 61(2): 701–707.
PMCID: PMC225216
The cross-linking of collagen and elastin: enzymatic conversion of lysine in peptide linkage to alpha-aminoadipic-delta-semialdehyde (allysine) by an extract from bone.
S R Pinnell and G R Martin
Proc Natl Acad Sci U S A. 1968 October; 61(2): 708–716.
PMCID: PMC225217
The biological activity of 25-hydroxycholecalciferol, a metabolite of vitamin D3.
J W Blunt, Y Tanaka, and H F DeLuca
Proc Natl Acad Sci U S A. 1968 October; 61(2): 717–718.
PMCID: PMC225218
Inhibition of the attachment of messenger ribonucleic acid to ribosomes.
A P Grollman and M L Stewart
Proc Natl Acad Sci U S A. 1968 October; 61(2): 719–725.
PMCID: PMC225219
Studies on the formation of trensfer ribonucleic acid-ribosome complexes. V. On the function of a soluble transfer factor in protein synthesis.
S Pestka
Proc Natl Acad Sci U S A. 1968 October; 61(2): 726–733.
PMCID: PMC225220
A conformational analysis of gramicidin S-A by nuclear magnetic resonance.
A Stern, W A Gibbons, and L C Craig
Proc Natl Acad Sci U S A. 1968 October; 61(2): 734–741.
PMCID: PMC225221
A model for protein biosynthesis predicated on the concept of metastable states: a postulated role for genetic code degeneracy.
W M Mitchell
Proc Natl Acad Sci U S A. 1968 October; 61(2): 742–747.
PMCID: PMC225222
The enzymatic conversion of heme to bilirubin by microsomal heme oxygenase.
R Tenhunen, H S Marver, and R Schmid
Proc Natl Acad Sci U S A. 1968 October; 61(2): 748–755.
PMCID: PMC225223
The relationship between red cell 2,3-diphosphoglycerate and levels of hemoglobin in the human.
J W Eaton and G J Brewer
Proc Natl Acad Sci U S A. 1968 October; 61(2): 756–760.
PMCID: PMC225224
A factor required for ribosome dissociation in Escherichia coli.
A R Subramanian, E Z Ron, and B D Davis
Proc Natl Acad Sci U S A. 1968 October; 61(2): 761–767.
PMCID: PMC225225
Release factors differing in specificity for terminator codons.
E Scolnick, R Tompkins, T Caskey, and M Nirenberg
Proc Natl Acad Sci U S A. 1968 October; 61(2): 768–774.
PMCID: PMC225226
Corrections
A TWO-STRUCTURE MODEL FOR ELECTROLYTIC SOLUTIONS
Proc Natl Acad Sci U S A. 1968 October; 61(2): 775.
PMCID: PMC225227
Corrects: M. H. Lietzke, et al. A TWO-STRUCTURE MODEL FOR ELECTROLYTIC SOLUTIONS. Proc Natl Acad Sci U S A. 1968 January; 59(1): 39–45.
MECHANISM OF DNA CHAIN GROWTH, II. ACCUMULATION OF NEWLY SYNTHESIZED SHORT CHAINS IN Escherichia coli INFECTED WITH LIGASE-DEFECTIVE T4 PHAGES
Proc Natl Acad Sci U S A. 1968 October; 61(2): 775.
PMCID: PMC225228
Corrects: K Sugimoto, et al. Mechanism of DNA chain growth, II. Accumulation of newly synthesized short chains in E. coli infected with ligase-defective T4 phages. Proc Natl Acad Sci U S A. 1968 August; 60(4): 1356–1362.
GENETICS OF SOMATIC MAMMALIAN CELLS, VII. INDUCTION AND ISOLATION OF NUTRITIONAL MUTANTS IN CHINESE HAMSTER CELLS
Proc Natl Acad Sci U S A. 1968 October; 61(2): 775.
PMCID: PMC225229
Corrects: F T Kao, et al. Genetics of somatic mammalian cells, VII. Induction and isolation of nutritional mutants in Chinese hamster cells. Proc Natl Acad Sci U S A. 1968 August; 60(4): 1275–1281.
Journal Matter
Original table of contents page
Administrative content — journal masthead, notices, indexes, etc.
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