CONTENTS

INDEX TO AUTHORS OF ARTICLES (Volume 64, no. 2) . . - . 803 PHYeAL UN ES

F AON OF SURFACE CHEMISTRY.-AN IMPROVED ITERATION M laL TENSION USING TEE SIGNMICANT SRUCTURIETHEORY OF IJQUDSB. By Mu Shik Jhon and Henry Eyring 415 CHEMISTRY.-THE EtTRAcELLuLAR NUCLEAsE OF Staphylococcus aureus: STRUC- TURES OF THE NATIVE ENZYME AND AN ENZYME-INHIBITOR COMPLEX AT 4 AV RESOLUTION .By Arthur Arnone, C. James Bier, F. Albert Cotton, Edward E. Hazen, Jr., David C. Richardson, and Jane S. Richardson 420 CHEMISTRY.-SOLID PHASE SYNTHESIS OF A 42-RESIDUE FRAGMENT OF STAPHYLOCOC- CAL NUCLEASE: PROPERTIES OF A SEMISYNTHETIC ENZYME. By David A. Ontjes and Christian B. Anfinsen 428 CHEMISTRY.-HYDROCARBON DISTRIBUTION OF ALGAE AND BACTERIA, AND MICRO- BIOLOGICAL ACTIVITY IN SEDIMENTS . . . . By Jerry Han and Melvin Calvin 436 CHEWSTRY.-SENSITIVt CRITERIA FOR THE CRITICAL SIZE FOR HELIX FORMATION IN OLIGOPEPTIDES .By Murray Goodman, Antonio S. Verdini, Claudio Toniolo, William D. Phillips, and Frank A. Bovey 444 CHEMISTRY.-INTERBASE VIBRATIONAL COUPLING IN G: C POLYNUCLEOTIDE HELICES . By F. B. Howard, J. Frazier, and H. Todd Miles 451 PHYSICS.-FERROMAGNETISM AND SUPERCONDUCTIVITY IN URANIUM COMPOUNDS . By B. T. Matthias, C. We. Chu, E. Corenzwit, and D. Wohlleben 459 MATHEMAT1CS.-SOME BILINEAR GENERATING FUNCTIONS . By H. M. Srivastava 462 MATHEMATICS.-CLASSIFICATION OF THE REAL INFINITE SIMPLE AND REAL IN- FINITE PRIMITIVE LIu ALGEBRAS .By Steven Shnider 466 MATEMATICS.-ON THE VITALI-HAHN-SAKS AND NIKOD4M THEOREMS. By James K. Brooks 468 BIOLOGICAL SCIENCES

BOTANY.-TEMPERATURE AND MANGANESE AS DETERMINING FACTORS IN THE PRES- ENCE OF DIATOM OR BLUE-GREEN ALGAL FLORAS IN STREAMS By Ruth Patrick, W. Bowman Crum, and John S. Coles 472 BOTANY.-THE HIGH-ENERGY LIGHT ACTION CONTROLLING PLANT RESPONSES AND DEVELOPMENT. By H. A. Borthwick, S. B. Hendricks, M. J. Schneider, R. B. Taylorson, and V. K. Toole 479 BOTANY.J-QUANTITATIVE STUDY OF CLINAL VARIATION IN Juniperus virginiana US- ING TERPENOID DATA . By Robert H. Flake, Ernst von Rudloff, and B. L. Turner 487 BOTANY.-AUXIN AND GROWTH OF EXCISED RooTs OF Bryophyllum calycinum. .By William J. Robbins and Annette Hervey 495 PHYSIOLOGY.-CONTROL OF GENE ACTIVITIES IN THE POLYTENE CHROMOSOMES OF Chironomus tentans BY ECDYSONE AND JUVENILE HORMONE By Markus Lezzi and Lawrence I. Gilbert 498 PHYSIOLOGY.-CROSS-BRIDGE PROPERTIES DERIVED FROM MUSCLE ISOTONIC VELOCITY TRANSIENTS .By R. J. Podolsky, A. C. Nolan, and S. A. Zaveler 504 PHYSIOLOGY.-AXOPLASMIC TRANSPORT IN THE CRAYFISH NERVE CORD . By H. L. Fernandez and P. F. Davison 512 MICROBIOLOGY.-COMPLEMENT COMPONENTS REQUIRED FOR VIRUS NEUTRALIZATION BY EARLY IGM ANTIBODY . . By William D. Linscott and Warren E. Levinson 520 MICROBIOLOGY.-STRUCTURE OF THE PEPTIDOGLYCAN OF BACTERIAL SPORES: OCCUR- RENCE OF THE LACTAM OF MURAMIC ACID By A. D. Warth and J. L. Strominger 528 MICROBIOLOGY.-PRELIMINARY ANALYSIS OF THE REQUIREMENTS FOR FUSION FROM WITHIN AND FUSION FROM WITHOU7'- NEWCASTLE DISEASE VIRUS. .- . . . By Michael A. Bratt and William R. Gallaher 536 MICROBIOLOGY.-NONPERMISSIVE INFECTIONS OF MAMMALIAN CELLS: SYNTHESIS OF INFLUENZA VIRUS GENOME IN HELA CELLS . By R. A. Lerner and L. D. Hodge 544 PSYCHOLOGY.-AUDITORY SENSITIVITY IN THE BULLHEAD CATFISH (Ictalurus nebulosis) .By Burton A. Weiss, William F. Strother, and George M. Hartig 552 (Continued on inside back cover) CONTENTS (Continued from back cover)

MEDICAL SCIENCES.-THE OCCURRENCE OF SUBSTANCES IN HUMAN PLASMA CAPABLE OF INDUCING THE ENZYME 8AM1NOLEVULINATE SYNTHETASE IN LIVER CELLS . By Attallah Kappas, Chull S. Song, Shigeru Sassa, Richard D. Levere, and S. Granick 557 ZOOLOGY.-CORRELATED EFFECTS OF ECDYSONE AND NEUROSECRETION IN PUPARIUM FORMATION (PUPARIATION) OF FLIES . . . . By Jan Zdarek and G. Fraenkel 565 GENETICS.-A MECHANISM FOR GENETIC RECOMBINATION GENERATING ONE PARENT AND ONE RECOMBINANT .By Thierry Boon and Norton D. Zinder 573 GENETICS.-A MODEL RELATING GENE REPLICAS AND GENE REPRESSION TO PHENO- TYPIC EXPRESSION AND VARIABILITY .By J. M. Rendel 578 GENETICS.-THE GENETIC CODE AND ERROR TRANSMISSION By Cynthia Alff-Steinberger 584 GENETICS.-HETEROGENEOUS CIRCULAR DNA ELEMENTS IN VEGETATIVE CULTURES OF Bacillus megaterium . . . . By Bruce C. Carlton and Donald R. Helinski 592 GENET1CS.-MOLECULAR HYBRID1ZATION OF RADIOACTIVE DNA TO THE DNA OF CYTO- LOGICAL PREPARATIONS.. By Mary Lou Pardue and Joseph G. Gall 600 BIOCHEMISTRY.-ISOLATION OF #-GLUCAN SYNTHETASE PARTICLES FROM PLANT CELLS AND IDENTIFICATION WITH GOLGI MEMBRANES . By Peter M. Ray, Terry L. Shininger, and Margery M. Ray 605 BIOCHEMISTRY.-STUDIES ON THE PROTEINS OF DX174, II. THE PROTEIN COMPOSI- TION OF THE -X COAT .By Ann B. Burgess 613 r BIOCHEMISTRY.-ABNORMAL CIRCULAR DNA MOLECULES INDUCED BY ETHIDIUM BRO- MIDE IN THE KINETOPLAST OF Trypanosoma cruzi. .By Guy Riou and Etienne Delain 618 BIOCHEMISTRY.-RNA SYNTHESIS IN CELLS INFECTED WITH HERPES SIMPLEX VIRUS, II. EVIDENCE THAT A CLASS OF VIRAL MRNA IS DERiVED FROM A HIGH MOLECU- LAR WEIGHT PRECURSOR SYNTHESIZED IN THE NUCLEUS. By Edward K. Wagner and Bernard Roizman 626 BiOCHEMISTRY.-THE RELATIONSHIP OF THE INFLUENZA VIRUS INHIBITORY ACTIVITY OF GLYCOPROTEINS TO THEIR MOLECULAR SIZE AND SIALIC ACID CONTENT By Georg F. Springer, H. Gerhard Schwick, and Mary Ann Fletcher 634 BIOCHEMISTRY.-RIBOSOMAL RNA GENES IN BACTERIA: EVIDENCE FOR THE NATURE OF THE PHYSICAL LINKAGE BETWEEN 16S AND 23S RNA GENES IN Bacillus subtilis .By W. Colli and M. Oishi 642 BIOCHEMISTRY.-ACTIVE CENTER FRACTIONS FROM Rhodopseudomonas spheroides STRAIN Y. (DE KLERK) . . By G. Jolchine, F. Reiss-Husson, and M. D. Kamen 650 BIOCHEMISTRY.-DISSOCIATION OF 70S RIBOSOMES: SOME PROPERTIES OF THE DiSSO- CIATING FACTOR FROM Bacillus stearothermophilus AND Escherichia coli . . By Ernesto G. Bade, Nelida S. Gonzdlez, and Israel D. Algranati 654 BIOCHEMISTRY.-BEHAVIOR INDUCTION BY BRAIN EXTRACTS: A COMPARISON OF TWO PROCEDURES .By Frank Rosenblatt 661 BIOCHEMISTRY.-THE POLYAMINE CONTENT OF THE TRNA OF E. coli . By Seymour S. Cohen, Sophronia Morgan, and Ellen Streibel 669 BIOCHEMISTRY.-DAILY RHYTHMS IN HEPATIC POLYSOME PROFILES AND TYROSINE TRANSAMINASE ACTIVITY: ROLE OF DIETARY PROTEIN ..7 . By Bette Fishman, Richard J. Wurtman, and Hamish N. Munro AOP BIOCHEMISTRY.-ESTEROLYTIC ACTIVITY OF ELASTASE. By Patrick Geneste and Myron L. Bender 683 BIOCHEMISTRY.-REPRESSION-DEPENDENT ALTERATION OF AN ARGININE ENZYME IN Escherichia coli . . By Thomas Leisinger, Ruth H. Vogel, and Henry J. Vogel 686 BIOCHEMISTRY.-RIBONUCLEASE V OF Escherichia coli, I. DEPENDENCE ON RIBOSOMES AND TRANSLOCATION .By Michihiko Kuwano, Catherine Ning Kwan, David Apirion, and David Schlessinger 693 BIOCHEMISTRY.-THE REPLICATION OF THE RING-SHAPED DNA OF POLYOMA VIRUS, I. IDENTIFICATION OF THE REPLICATIVE INTERMEDIATE By Pierre Bourgaux, Danielle Bourgaux-Ramoisy, and Renato Dulbecco 701 BIOCHEMISTRY.-STUDIES ON THE FORMATION OF TRANSFER RIBONUCLEIC AC1D-RIBO- SOME COMPLEXES, XI. ANTIBIOTIC EFFECTS ON PHENYLALANYLOLIGONUCLEO. TIDE BINDING TO RIBOSOMES .By Sidney Pestka 709 (Continued on facing page) CONTENTS (Continued from inside back cover)

BIOCHEMISTRY.-A CONCEPT OF THREE LIGHT REACTIONS IN PHOTOSYNTHESIS BY GREEN PLANTS. . By David B. Knaff and Daniel I. Arnon 715 BIOCHEMISTRY.-CONTROL OF TYROSINE AMINOTRANSFERASE SYNTHESIS IN TISSUE CULTURE BY A FACTOR IN SERUM. By Thomas D. Gelehrter and Gordon M. Tomkins 7236 BIOCHEMISTRY.-PHOTOHYDRATION OF URIDINE IN THE RNA OF COLIPHAGE R17, I. REDUCTIVE ASSAY FOR URIDINE PHOTOHYDRATION. By P. A. Cerutti, N. Miler, M. G. Pleiss, J. F. Remsen, and W. J. Ramsay 731 BIOCHEMISTRY.-NUCLEAR AND MrTOCHONDRIL DNA FROM WILD-TYPE AND PETITE YEAST: CIRCULARITY, LENGTH, AND BUOYANT DENSITY...... By Foster E. Billheiner and Charlotte J. Avers 739 BIOCHEMISTRY.-ON THE REPLICATION OF INCOMPLETE CHROMOSOMES. OF PHAGE T4 By G. Mosig and R. Werner 747 BIOCHEMISTRY.-STABLE FREE-RADICAL FORMS OF PLASMA PROTEINS OR SIMPLER RELATED STRUCTURES WHICH INDUCE BRAIN EXCITATORY fFFECTS Bd B. David Polis, John Wyeth, Leonide Goldstein, and Joe Graedon 755 BIOCHEMISTRY.-M1CROCALORIMETRIC STUDIES ON THE FORMATION OF MAGNESIUM COMPLEXES OF ADENINE NUCLEOTIDES . . . By J. P. Belaich and J. C. Sari 763 BIOCHEMISTRY.-THE AMINO ACID SEQUENCE OF SALMON ULTIMOBRANCHIAL CALCI- TONIN . . . By H. D. Niall, H. T. Keutmann, D. H. Copp, and J. T. Potts, Jr. 771 BIOCHEMISTRY.-DNA-DEPENDENT SYNTHESIS OF RNA BY Escherichid coli RNA POLYMERASE: RELEASE AND REINITIATION OF RNA CHAINS FROM DNA TEM- PLATES. .By Umadas Maitra and Fred Barash 7794 BIOCHEMISTRY.-THE NERVE GROWTH FACTOR: PURIFICATION AS A 30,000-MOLECU- LAR-WEIGHT PROTEIN . . . . By Vincenzo Bocchini and Pietro U. Angeletti 787 V BIOCHEMISTRY.-FACTORS INFLUENCING PREMATURE INDUCTION OF UDP-GLUCURONYL- TRANSFERASE ACTIVITY IN CULTURED CHICK EMBRYO LIVER CELLS By Brian R. Skea and Andrew M. Nemeth 795