This journal provides immediate access to some articles. Volume 68(6); June 1971 Biological Sciences: Anthropology Beginnings of Village-Farming Communities in Southeastern Turkey PMCID: PMC389161 Biological Sciences: Biochemistry Identification of the Essential Light Chains of Myosin PMCID: PMC389129 Evidence for the Existence of Several Molecular Species in the “45S Fraction” of Mammalian Ribosomal Precursor RNA PMCID: PMC389132 Unusual Fragments in the Subunit Structure of Concanavalin A PMCID: PMC389135 Crystallization and Preliminary Structural Analysis of Dihydrolipoyl Transsuccinylase, the Core of the 2-Oxoglutarate Dehydrogenase Complex PMCID: PMC389136 Evidence for Procollagen, a Biosynthetic Precursor of Collagen PMCID: PMC389137 Differential Effect of 5-Bromodeoxyuridine on the Concentrations of Specific Enzymes in Hepatoma Cells in Culture PMCID: PMC389139 Heterogeneity, Complexity, and Repetition of the Chloroplast DNA of Chlamydomonas reinhardtii PMCID: PMC389141 Circular Chloroplast DNA from Euglena gracilis PMCID: PMC389144 Transduction of the Nitrogen-Fixation Genes in Klebsiella pneumoniae PMCID: PMC389145 Interaction of Aromatic Amino Acids with Neutral Polyadenylic Acid PMCID: PMC389150 Fluorescence Spectroscopy of an Oriented Model Membrane PMCID: PMC389157 Purification and DNA-Binding Properties of the Catabolite Gene Activator Protein PMCID: PMC389158 New Forms of Bovine Carboxypeptidase B and Their Homologous Relationships to Carboxypeptidase A PMCID: PMC389159 Isolation of a Calcium-Sequestering Protein from Sarcoplasmic Reticulum PMCID: PMC389160 Acetyl CoA Carboxylase: The Purified Transcarboxylase Component PMCID: PMC389167 Insulin-Receptor Interactions in Adipose Tissue Cells: Direct Measurement and Properties PMCID: PMC389168 Evidence for Induction by Cortisol In Vitro of a Protein Inhibitor of Transport and Phosphorylation Processes in Rat Thymocytes PMCID: PMC389169 Mechanism of Action of 1,25-Dihydroxycholecalciferol on Intestinal Calcium Transport PMCID: PMC389173 Adenosine Triphosphate-Dependent Synthesis of Biologically Active DNA by Azide-Poisoned Bacteria PMCID: PMC389176 A Bovine Pancreatic Enzyme Catalyzing the Conversion of Proinsulin to Insulin PMCID: PMC389179 Effect of Double-Stranded Viral RNA on Mammalian Cells in Culture PMCID: PMC389182 A Polynucleotide Segment Rich in Adenylic Acid in the Rapidly-Labeled Polyribosomal RNA Component of Mouse Sarcoma 180 Ascites Cells PMCID: PMC389183 Polyadenylic Acid Sequences in the Heterogeneous Nuclear RNA and Rapidly-Labeled Polyribosomal RNA of HeLa Cells: Possible Evidence for a Precursor Relationship PMCID: PMC389184 Conformational Model of Active Transport: Role of Protons PMCID: PMC389190 RNA-Dependent RNA Polymerase Activity in Influenza Virions PMCID: PMC389191 In Vitro Synthesis of Deoxynucleotide Kinase Programmed by Bacteriophage T4-RNA PMCID: PMC389193 Biological Sciences: Botany Induction of Cytokinin-Independent Tobacco Tissues by Substituted Fluorenes PMCID: PMC389146 Biological Sciences: Cell Biology Restoration of Contact-Inhibited Growth to Transformed Cells by Dibutyryl Adenosine 3′:5′-Cyclic Monophosphate PMCID: PMC389180 Biological Sciences: Genetics Induction of Translocations in Mature Drosophila Oocytes Over a Dose Range of 10-500 Roentgens of X-Rays PMCID: PMC389126 Isolation and Chromosomal Localization of Highly Repeated DNA Sequences in Drosophila melanogaster PMCID: PMC389134 Organelle Mutations and Their Expression in Chlamydomonas reinhardi PMCID: PMC389177 Temperature-Sensitive Mutations in Drosophila melanogaster, VIII. The Homeotic Mutant, ssa40a PMCID: PMC389178 Biological Sciences: Immunology Antibody Formation: Reduced Responses After Administration of Excessive Amounts of Nonspecific Stimulators PMCID: PMC389131 Heavy-Chain Variable Regions in Normal and Pathological Immunoglobulins PMCID: PMC389138 Extrinsic Cotton Effects in Hapten—Carrier and Hapten—Antibody Interactions PMCID: PMC389148 Membrane-Associated DNA in the Cytoplasm of Diploid Human Lymphocytes PMCID: PMC389156 Structural Basis of the A14 and A15 Allotypic Specificities in Rabbit Immunoglobulin G PMCID: PMC389185 In Vitro Detection of Cytotoxic Cellular Immunity Against Tumor-Specific Antigens by a Radioisotopic Technique PMCID: PMC389186 An Alternate Complement Pathway: C-3 Cleaving Activity, Not Due to [unk], on Endotoxic Lipopolysaccharide after Treatment with Guinea Pig Serum; Relation to Properdin PMCID: PMC389187 Suggestive Evidence That the “Blocking Antibodies” of Tumor-Bearing Individuals May Be Antigen-Antibody Complexes PMCID: PMC389192 Biological Sciences: Medical Sciences Potassium Cyanate as an Inhibitor of the Sickling of Erythrocytes In Vitro PMCID: PMC389147 Relation of the Conformation of Oxytocin to the Biology of Neurohypophyseal Hormones PMCID: PMC389188 Biological Sciences: Microbiology DNA Synthesis in Mixed Cultures of Rat Leukocytes and Allogeneic Dissociated Skin Cells PMCID: PMC389143 Analysis of the Events Leading to SV40-Induced Chromosome Replication and Mitosis in Primary Mouse Kidney Cell Cultures PMCID: PMC389155 An Adenylic Acid-Rich Sequence in Messenger RNA of HeLa Cells and Its Possible Relationship to Reiterated Sites in DNA PMCID: PMC389181 Biological Sciences: Pathology In Vitro Transformation of Rodent Cells by K-Region Derivatives of Polycyclic Hydrocarbons PMCID: PMC389127 Biological Sciences: Physiology A Unique Synaptosomal Fraction, Which Accumulates Glutamic and Aspartic Acids, in Brain Tissue PMCID: PMC389128 Sympathetic Reinnervation of the Rat Iris in Organ Culture PMCID: PMC389133 Local Supply of Energy to the Fast Axoplasmic Transport Mechanism PMCID: PMC389171 Biological Sciences: Psychology Acetoxycycloheximide and Transient Amnesia in the Rat PMCID: PMC389164 Biological Sciences: Zoology Interactions in Colonies of Primitively Social Bees: Artificial Colonies of Lasioglossum zephyrum PMCID: PMC389162 Regional Coexistence of Species and Competition between Rare Species PMCID: PMC389163 Interconnected Patterns of Biogeography and Evolution PMCID: PMC389166 Temperature Physiology of the Sea Snake Pelamis platurus: An Index of Its Colonization Potential in the Atlantic Ocean PMCID: PMC389189 Physical Sciences: Applied Mathematics A New Labor Theory of Value for Rational Planning Through Use of the Bourgeois Profit Rate PMCID: PMC389151 Physical Sciences: Chemistry The Crystal and Molecular Structure of an Intermolecular Complex between Riboflavin and an Adenosine Derivative PMCID: PMC389140 Conformation of Cyclolinopeptide A Observed by Circular Dichroism PMCID: PMC389152 Conformation of Cyclolinopeptide A Observed by Nuclear Magnetic Resonance Spectroscopy PMCID: PMC389153 Approximate Treatment of the Conformational Characteristics of a Cyclic Nonapeptide, Cyclolinopeptide A PMCID: PMC389154 Molecular Characteristics of Some Carcinogenic Hydrocarbons PMCID: PMC389165 Bent Fatty Acid Chains in Lecithin Bilayers PMCID: PMC389170 Ring Orientation in βIonone and Retinals PMCID: PMC389174 Practical, Stereoselective Synthesis of Cecropia Juvenile Hormone PMCID: PMC389175 Physical Sciences: Geology The Ages of the Lunar Seas PMCID: PMC389149 Physical Sciences: Geophysics The Magnetic Field Induced by the Bodily Tide in the Core of the Earth PMCID: PMC389130 Physical Sciences: Mathematics Tricubic Polynomial Interpolation PMCID: PMC389142 Physical Sciences: Physics Experiments on Osmosis with Magnetic Fluid PMCID: PMC389125 Magnetic Anisotropy and the Orientation of Retinal Rods in a Homogeneous Magnetic Field PMCID: PMC389172 Corrections Further characterization of the cellular DNA hybridizing with the RNA of Rous sarcoma virus PMCID: PMC389194 Corrects: Further Characterization of the Cellular DNA Hybridizing with the RNA of Rous Sarcoma Virus. Proc Natl Acad Sci U S A. 1971 April; 68(4): 743–746. Calcium as a regulator of the proliferation of normal, but not of transformed, chicken fibroblasts in a plasma-containing medium PMCID: PMC389195 Corrects: Calcium as a Regulator of the Proliferation of Normal, but Not of Transformed, Chicken Fibroblasts in a Plasma-Containing Medium. Proc Natl Acad Sci U S A. 1971 February; 68(2): 271–275. Journal Matter Original table of contents page Administrative content — journal masthead, notices, indexes, etc. | ||