Table of Contents

Research Article

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  Separation of the proliferating and differentiating cell populations of cultured embryonic pancreatic epithelium

  M R Bernfield and P E Fell

  PNAS December 1, 1967 58 (6) 2227-2234; https://doi.org/10.1073/pnas.58.6.2227
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  Aminoacyl-sRNA synthetases as possible regulators of protein synthesis in the embryo of the sea urchin Paracentrotus lividus

  C Ceccarini, R Maggio, and G Barbata

  PNAS December 1, 1967 58 (6) 2235-2239; https://doi.org/10.1073/pnas.58.6.2235
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  Evidence for sperm dysfunction as the mechanism of segregation distortion in Drosophila melanogaster

  D L Hartl, Y Hiraizumi, and J F Crow

  PNAS December 1, 1967 58 (6) 2240-2245; https://doi.org/10.1073/pnas.58.6.2240
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  Bi-ionic action potentials in squid giant axons internally perfused with sodium saltssalts

  A Watanabe, I Tasaki, and L Lerman

  PNAS December 1, 1967 58 (6) 2246-2252; https://doi.org/10.1073/pnas.58.6.2246
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  Geometry of carcinogenic polycyclic aromatic hydrocarbons

  C B Huggins, J Pataki, and R G Harvey

  PNAS December 1, 1967 58 (6) 2253-2260; https://doi.org/10.1073/pnas.58.6.2253
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  Concentration, quantitation, and identification of hemopoietic stem cells

  H Niewisch, H Vogel, and G Matioli

  PNAS December 1, 1967 58 (6) 2261-2267; https://doi.org/10.1073/pnas.58.6.2261
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  Growth in suckling-mouse brain of "IBV-like" viruses from patients with upper respiratory tract disease

  K McIntosh, W B Becker, and R M Chanock

  PNAS December 1, 1967 58 (6) 2268-2273; https://doi.org/10.1073/pnas.58.6.2268
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  Photoreactivation in an established vertebrate cell line

  J D Regan and J S Cook

  PNAS December 1, 1967 58 (6) 2274-2279; https://doi.org/10.1073/pnas.58.6.2274
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  RNA polymerase activity in purified infectious vaccinia virus

  W Munyon, E Paoletti, and J T Grace Jr

  PNAS December 1, 1967 58 (6) 2280-2287; https://doi.org/10.1073/pnas.58.6.2280
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  Biosynthetic units of an immunoglobulin heavy chain

  P M Knopf, R M Parkhouse, and E S Lennox

  PNAS December 1, 1967 58 (6) 2288-2295; https://doi.org/10.1073/pnas.58.6.2288
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  Affinity labeling of the anionic site of acetylcholinesterase

  L Wofsy and D Michaeli

  PNAS December 1, 1967 58 (6) 2296-2298; https://doi.org/10.1073/pnas.58.6.2296
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  Studies of the mechanism of the hypoglycemic action of 4-pentenoic acid

  C Corredor, K Brendel, and R Bressler

  PNAS December 1, 1967 58 (6) 2299-2306; https://doi.org/10.1073/pnas.58.6.2299
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  Similarities in the chemical structure of human placental lactogen and pituitary growth hormone

  L M Sherwood

  PNAS December 1, 1967 58 (6) 2307-2314; https://doi.org/10.1073/pnas.58.6.2307
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  Mutants of Escherichia coli permeable to actinomycin

  M Sekiguchi and S Iida

  PNAS December 1, 1967 58 (6) 2315-2320; https://doi.org/10.1073/pnas.58.6.2315
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  Enzymatic synthesis of DNA, XXIV. Synthesis of infectious phage phi-X174 DNA

  M Goulian, A Kornberg, and R L Sinsheimer

  PNAS December 1, 1967 58 (6) 2321-2328; https://doi.org/10.1073/pnas.58.6.2321
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  Hydrogen addition radicals of stilbestrol, hexestrol, and benzestrol

  F G Liming Jr, J N Herak, and W Gordy

  PNAS December 1, 1967 58 (6) 2329-2335; https://doi.org/10.1073/pnas.58.6.2329
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  Nonidentical subunits of bacterial luciferase: their isolation and recombination to form active enzyme

  J Friedland and J W Hastings

  PNAS December 1, 1967 58 (6) 2336-2342; https://doi.org/10.1073/pnas.58.6.2336
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  Regulation of bacteriophage lambda DNA replication

  M H Green, B Gotchel, J Hendershott, and S Kennel

  PNAS December 1, 1967 58 (6) 2343-2350; https://doi.org/10.1073/pnas.58.6.2343
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  Evidence for a low-molecular-weight collagen precursor

  I Bekhor and L A Bavetta

  PNAS December 1, 1967 58 (6) 2351-2358; https://doi.org/10.1073/pnas.58.6.2351
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  Studies on steroid regulation of synthesis of a specific oviduct protein in a new monolayer culture system

  B W O'Malley and P O Kohler

  PNAS December 1, 1967 58 (6) 2359-2366; https://doi.org/10.1073/pnas.58.6.2359
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  The localization of spermidine in salivary gland cells of Drosophila melanogaster and its effect on H3-uridine incorporation

  A S Dion and E J Herbst

  PNAS December 1, 1967 58 (6) 2367-2371; https://doi.org/10.1073/pnas.58.6.2367
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  Multiple-length rings of phi-X-174 replicative form, II. Infectivity

  M G Rush and R C Warner

  PNAS December 1, 1967 58 (6) 2372-2376; https://doi.org/10.1073/pnas.58.6.2372
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  Requirement of glucosylated teichoic acid for adsorption of phage in Bacillus subtilis 168

  F E Young

  PNAS December 1, 1967 58 (6) 2377-2384; https://doi.org/10.1073/pnas.58.6.2377
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  The contribution of DNA to translation errors induced by streptomycin in vitro

  T E Likover and C G Kurland

  PNAS December 1, 1967 58 (6) 2385-2392; https://doi.org/10.1073/pnas.58.6.2385
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  Studies on the structural basis of the interaction of myosin and actin

  M Young

  PNAS December 1, 1967 58 (6) 2393-2400; https://doi.org/10.1073/pnas.58.6.2393
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  Determination of the number of active muscle ribosomes: effect of diabetes and insulin

  I G Wool and K Kurihara

  PNAS December 1, 1967 58 (6) 2401-2407; https://doi.org/10.1073/pnas.58.6.2401
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  In vitro stability of phage messenger ribonucleic acid

  S K Bose and R J Warren

  PNAS December 1, 1967 58 (6) 2408-2414; https://doi.org/10.1073/pnas.58.6.2408
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  The lac operator is DNA

  W Gilbert and B Müller-Hill

  PNAS December 1, 1967 58 (6) 2415-2421; https://doi.org/10.1073/pnas.58.6.2415
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  Studies on cell-free synthesis of rat immunoglobulins, II. Synthesis of immunoglobulin and of antibody to the dinitrophenyl hapten

  P Vassalli, B Lisowska-Bernstein, M E Lamm, and B Benacerraf

  PNAS December 1, 1967 58 (6) 2422-2429; https://doi.org/10.1073/pnas.58.6.2422
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  Structure and function of E. coli ribosomes, IV. Isolation and characterization of functionally active ribosomal proteins

  P Traub, K Hosokawa, G R Craven, and M Nomura

  PNAS December 1, 1967 58 (6) 2430-2436; https://doi.org/10.1073/pnas.58.6.2430
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  Chromatographic differences between tyrosyl transfer RNA from different mammalian cells

  J J Holland, M W Taylor, and C A Buck

  PNAS December 1, 1967 58 (6) 2437-2444; https://doi.org/10.1073/pnas.58.6.2437
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  The photoreduction of spinach ferredoxin in the presence of porphyrin and an electron donor

  R J Kassner and M D Kamen

  PNAS December 1, 1967 58 (6) 2445-2450; https://doi.org/10.1073/pnas.58.6.2445
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  Pretransition-state protonation and the rate of chymotrypsin catalysis

  J H Wang and L Parker

  PNAS December 1, 1967 58 (6) 2451-2454; https://doi.org/10.1073/pnas.58.6.2451
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  Studies on polynucleotides, LXXXIV. On the role of ribosomal subunits in protein synthesis

  H P Ghosh and H G Khorana

  PNAS December 1, 1967 58 (6) 2455-2461; https://doi.org/10.1073/pnas.58.6.2455
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  Dimethyl sulfoxide: activation of lysosomes in vitro

  D W Misch and M S Misch

  PNAS December 1, 1967 58 (6) 2462-2467; https://doi.org/10.1073/pnas.58.6.2462
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  Polymerization of nucleoside diphosphate with a manganese-dependent enzyme from Escherichia coli Q13

  W T Hsieh and J M Buchanan

  PNAS December 1, 1967 58 (6) 2468-2475; https://doi.org/10.1073/pnas.58.6.2468
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  Conformational studies on the membrane protein of sarcotubular vesicles

  W F Mommaerts

  PNAS December 1, 1967 58 (6) 2476-2482; https://doi.org/10.1073/pnas.58.6.2476
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  Addendum: concerning the mechanism of formation of UV-induced thymine photoproducts in DNA

  S Y Wang, M H Patrick, A J Varghese, and C S Rupert

  PNAS December 1, 1967 58 (6) 2483; https://doi.org/10.1073/pnas.58.6.2483