Index to Volume 10

Adductor muscle of the oyster Oraseostrea angulata, electron-microscope studies of thestructure of the filaments, 89

Allosteric effects with arylamine sulphokinase, 176Amino acid, DNA-dependent, incorporation in Escherichia coli extracts, 536- -, -, - into protein selectively inhibited in vitro by RNA, 359- acyl RNA synthetase inhibition by polynucleotides, 345- group reactivity in DNA-aminoacridine complexes, 367Aminoacridine-DNA complexes, amino group reactivity, 367AMMANN, J., DELIUS, H. & HOFSOHNEIDER, P. H., Isolation and properties of an intact

phage-specific replicative form of RNA phage M12, 557Arylamine sulphokinase producing possible allosteric effects, 176ASAKURA, S., EGUOHI, G. & IINo, T., Reconstitution of bacterial flagella in vitro, 42

b2 deletion of bacteriophage A, location, 341Bacillus subtilis bacteriophage SP82, infectivity of isolated DNA, 438- -, the mechanism of the histidase induction and formation, 105Bacterial flagella reconstituted in vitro, 42Bacteriophage A DNA, novel intra-cellular forms, 562- -, location of b2 deletion, 341- M12 RNA, isolation and properties of an intact phage-specific form, 557- -, the effects of protein synthesis inhibition on the replication, 554- MS2 replication. II. An in vivo specificity for the synthesis of infective RNA, 1- -, the replication. III. Asymmetric complementation between temperature-sensitive

mutants, 412-- MS2-RNA assay, 422- RNA replication: studies of the fate of parental RNA, 519- SP82 of Bacillus subtilis, infectivity of isolated DNA, 438- Tl, the role of cytosine photoproducts in ultraviolet inactivation, 551- T4, the effect of radiophosphorus decay on the cistron function. I. Long-range and

short-range hits, 488- T4, the structure of the "polyheads", 570- T4V _%_' an approach to determining the maximal contribution of thymine dimer to

ultraviolet inactivation, 180- T5, DNA transfer to host cells, molecular aspects. I. Characterization of first-step-

transfer materials, 10- - - -. III. Origin of first-step-transfer DNA fragments, 19- heterozygotes, an experimental analysis. II. Distribution in a density gradient, 212BARNARD, E. A., The unfolding and refolding of ribonuclease in urea solutions. I. Rates

and extents of physical changes, 225- - - -. II. The enzymic activity in urea and some states of unfolding, 263BEOKER, Y. (see JOKLIK, W. K.), 452BERG, A. & ZABIN, I., Immunological studies of ,a-galactosidase and thiogalactosidase

transacetylase; proteins of the lactose system in Escherichia coli, 289BERGER, J. E. (see KLuG, A.), 565BOEHNER, L. (see DOERMANN, A. H.), 212BRAHMS, J. & MOMMAERTS, W. F. H. M., A study of conformation of nucleic acid in

solution by means of circular dichroism, 73BRAWERMAN, G. & EISENSTADT, J. M., Template and ribosomal ribonucleic acids associated

with the chloroplasts and the cytoplasm of Euglena gracilis, 403

577

578 INDEX

BRAWERlIlAN, G. (see EISENSTADT, J. M.), 392BYRNE, R. (see EISERLING, F .), 536Cell st ructure of Ohorella pyrenoidosa gro wn under different ligh t intensit.ies, 57CHILSON, O. P., COSTELLO, L. A. & KAPLAN, N. 0., H ybridization oflactic dehydrogenase

in vitro by concentra ted sodium chlor ide and by reversible inactivation in urea, 349Chloramphenicol RNA, some abnormal properties , 508Chloroplas ts and cytoplasm of E uglena gracilis with which the t emplate and ribonucleic

acids are associated , 403- of Euglena gracilis , t he prot ein synthesizing systems, 392Ohorella pyrenoidosa grown under different ligh t intensities, the elect r on spin resonance

signals and cell structure, 57Chromosome replication in E scherichia coli, ev ide nce for t wo dist inct aspects of t he regu­

lating mechanism, 120Cistron funct ion in bacteriophage T4 , the effect of radiophosphorus decay. I. Long-range

and short-range hits, 488Coiled -coil model of «-keratin structure, 147COSTELLO, L. A. (see CHILSON, O. P .), :{49Cyclobuxine, effects on nucleic ac id interactions, 157Cytosine photoproducts in ultravi olet inac t ivat ion of bacteriophage Tl, 551

DAVIS, J . E., PFEIFER, D. & SINSHEIMER, R. L., The replication of bact eri ophage MS2.I I. An in vivo specificity for the synthesis of infective RNA, 1

- , (see P l!'EIFER, D.), 412Dehy drogenase (see la ctic dehydrogenase), 349DELIHAS, N ., RNA nucleotide sequence clusters of n ormal and R ous sarcoma virus­

infected t issues, 381DELIUS, H. & H OFsCIn"'EIDER, P . H ., The effects of protein synthesis inhib ition on t he

replicat ion of 1\112 phage R NA , 554- (see ~I!IIANN, J.), 557D eoxyribonucleic acid-aminoacrid ine complexes, amino group reactivi t y, 367- - and po ly A in solution, st ructure and t ransit ions ob served as a function of t empera-

ture and pH , 28- - -dependen t amino acid in corporation in E scherichia coli extracts, 536- - - - - - into protein selective ly inhibited in vi tro by R NA, 359- - isolated from BaciUus subtil is bact er iophage SP82, infect ivity, 438- - m ultistranded, homopolymer interact ion s, 137- - of bacteri ophage A, novel int racellula r forms, 562- - of vaccinia, t he replication and coating, 452- - transfer fro m phage T5 to host cells , m olecular aspects. I. Charac terizat ion of

first-step-t ransfer materi al , 10- - - -. III. Origin of first- st ep-transfer DNA fragments, 19Di chroism, circular, used to study the conformat ion of nucleic acid in solution, 73DOBB, M. G. Protofibrils in cc-keratin , 156DOERMANN, A. H. & BOEHNER, L. , An experiment al analysis of bacteriophage T5 hetero-

zygotes. II. Distribution in a densi t y gradient, 212DUBIN, D . T. & ELKORT, A. T., Som e abnormal properties of chloramphen icol RNA, 508DUNNEBACKE, T. H. (see KLEINSCHMIDT, A. K.) , 282DUTTON, G. (see MAHLER, H. R), 157

E GUCHI, G. (see AsAKURA, S. ), 42EISENSTADT, J . M. & BRAWERlIIAN, G., The protein-synthesizing systema from t he .cy to­

plasm and t he chloroplasts of E uglena gracilis, 392- (see BRAWERMAN, G.) , 403EISERLING, F., LEVIN, J. G., BYRNE, R. , KARLSSON, U. , NmENBERG, M. vV. & SJOSTRAND,

F. E., P olyribosomes and DNA-dependent am ino acid incorporation in Escherichiacoli extracts, 536

!XDEX 579

Electron diffraction used to determino the a-helix configuration of poly-y-benzyl-t­glutamate, 530

Electron micrographs, an optical method for the analysis of periodicities, and some observa­tions 011 the mechanism of negative staining, 565

- microscope studies of the structure of the filaments in the opaque adductor muscle ofthe oyster Orassoetrea angulata, 89

- microscopy of RNA from reovirus and wound tumor virus, 282- spin resonance signals and cell structure of Chorella pyrenoidosa grown under different

light intensities, 57Electronic structure of the prosthetic group and tertiary structure in haemoprotein. I.

Magnetic and optical properties of ferrous horse haemoglobin and myoglobin underthe reversible action of detergents, 475

Electrophoretic separation of the proteins of ribosome subunits and of encephalomyo­carditis virus, 544

ELKoRT, A. T. (see DUBIN, D. T.), 508ELLIOTT, G. Fo, Electron microscope studies of the structure of the filaments in the opaque

adductor muscle of the oyster Crassostrea angulata, 89Encephalomyocarditis virus and ribosome subunit proteins, electrophoretic separation, 544Enzyme, mutant, in Neurospora crassa interconvertible between electrophoretically

distinct and inactive forms, 423Enzymes of the Lac operon in Escherichia coli, the specificity of the induction, 303-, "serine", histidine sequences in the active centres, 183Enzymic acitivity in urea owing to the unfolding and refolding of ribonuclease, 263ERIKSON, R. L., FENWICK,M. L. & FRANKLIN, R. :\1., Replication of bacteriophage RNA:

studies of the fate of parental RXA, 519Escherichia coli, evidence for two distinct aspects ofthe mechanism regulating chromosome

replication, 120- -, expression of newly transferred genes controlling ,B-D-galactosidase synthesis, 337- -, fractionation of the ribosomal protein, 319- -, polyribosomes and DNA-dependent amino acid incorporation in extracts, 536- -, proteins of the lactose system; immunological studies of ,B-galactosidase and thio-

galactosidase transacetylase, 289- - the specificity of the induction of the enzymes of the Lac operon, 303Euglena gracilis, template and ribosomal ribonucleic acids associated with the chloroplasts

and the cytoplasm, 403- -, the protein-synthesizing systems from the cytoplasm and the chloroplasts, 392

Feather keratin, studies on the structure. IV. Solubilization effects of mercuric salts, 199FENWICK, M. L. (see ERIKSON, R. L.), 519FINCH, J. T., KLUG, A. & STRETTON, A. O. W. The structure of the polyheads of T4

bacteriophage, 570FINCHAM, J. R. S. (see SUNDARAM, T. K.), 423Flagella in bacteria reconstituted in vitro, 42FRANKLIN, R. M. (see ERIKSON, R. Lo), 519FRASER, R. D. B., MACRAE, T. P. & MILLER, A., The coiled-coil model of a-keratin

structure, 147FUCHS, Eo, ZILLIG,W., HOFSCHNEIDER, P. H. & PREUSS, A., Preparation and properties of

R~A-polymeraseparticles, 546

,B-Galactosidase and thiogalactosidase transacetylase, proteins of the lactose system inEscherichia coli, immunological studies, 259

,B-D-Galactosidase synthesis in Escherichia coli controlled by newly transferred genes, 337GANESAN, A. K. & ROT~A.."', B., Expression of newly transferred genes controlling

,B-D-galactosidase synthesis in Escherichia coli, 337Genes, newly transferred, controlling ,B-D-galactosidase synthesis in Escherichia coli, 337

39

580 INDEX

GERSONDE, K. & NETTER, H., Elektronenstruktur der prosthetisehen Gruppe undTertiarstruktur in Hamoproteiden, I. Magnetisch zund optisohe Eigenschaften des2-wertigen Pferdehamoglobins und -Myoglobins unter reversibler Detergenswirkung,475

GREEN, D. M., Infectivity of DNA isolated from Bacillus subtilis bacteriophage SP82, 438GRIFFIN, B. E., HASLAM, W. J. & REESE, C.B., Synthesis and properties of some methy­

lated polyadenylic acids, 353Haemoglobin, horse and myoglobin, magnetic and optical properties under the reversible

action of detergents, 475Haemoproteins, tertiary structure and the electronic structure of the prosthetic group. I.

Magnetic and optical properties of ferrous horse haemoglobin and myoglobin underthe reversible action of detergents, 475

HANCOCK, J. E. H. & MARKERT, A. R., Concerning icosahedral symmetry in virus mole­cules, and Sir William Hamilton's icosian game, 534

HARRIMAN, P. D. & STENT, G. S., The effect of radiophosphorus decay on cistron functionin bacteriophage T4. I. Long-range and short-range hits, 488

HARTLEY, B. S. (see SMILLIE, L.), 183HARTWELL, L. H. & MAGASANIK, B., The mechanism of histidase induction and formation

in Bacillus subtilis, 105HASLAM, W. J. (see GRIFFIN, B. E.), 353HAUG, A. (see SAUERBIER, W.), 180HAYASHI, H. & MIURA, K., Inhibition of amino acyl RNA synthetase by polynucleotides,

345a·Helix configuration of poly-y-benzyl-L-glutamate determined by electron diffraction,

530HEss, E. L. & HORN, R., Destruction by RNase of 30 sand 50 S ribosomes from Strepto­

coccus pyogenes, 541Heterozygotes of bacteriophage T5, an experimental analysis. II. Distribution in a density

gradient, 212Histidase induction and formation in Bacillus subtilis, 105Histidine sequences in the active centres of some "serine" enzymes, 183HOFSCHNEIDER, P. H. (see AMMANN, J.), 557- (see DELIUs, H.), 554- (see FUCHS, E.), 546HORN, R. (see HEss, E. L.), 541

Icosahedral symmetry in virus molecules and Sir William Hamilton's icosian game, 534IINo, T. (see ASAKURA, S.), 42IKEDA, S., MAEDA, H. & ISEMURA, T., The .a-structure of poly-S.carbobenzoxymethyl.L.

cysteine in solution, 223INMAN, R. B., Multistranded DNA homopolymer interactions, 137ISEMURA, T. (see IKEDA, S.), 223

JOKLIK, W. K. & BECKER, Y., The replication and coating of vaccinia DNA, 452JORDAN, E., The location of b2 deletion of bacteriophage A, 341

KAPLAN, N. O. (see CHILSON, O. P.), 349KARLSSON, U. (see EISERLING, F.), 536Keratin, feather, studies on the structure. IV. Solubilization effects of mercuric salts, 199ec-Keratin protofibrils, 156a-Keratin structure, the coiled-coil model, 147KInSON, C. & KIRBY, K. S., Patterns of messenger RNA synthesis in mammalian tissues:

analysis by counter-current distribution, 187KIBBY, K. S. (see KInSON, C.), 187

INDEX 581

KLEINSCHMIDT, A. K., DUNNEBACKE, T. H., SPENDLOVE, R. S., SCHAFFER, F. L. &WHITCOMB, R. F., The electron microscopy of RNA from reovirus and wound. tumorvirus, 282

KLuG, A. & BERGER,J. E., An optical method for the analysis of periodicities in electronmicrographs, and some observations on the mechanism of negative staining, 565

KLuG, A. (see FINCH, J. T.), 570KRIMM, S. (see TIFFANY, M. L.), 199

Lac operon in Escherichia coli, the specificity of the induction of the enzymes, 302Lactic dehydrogenase, hybridization in vitro by concentrated sodium chloride and by

reversible inactivation in urea, 349Lactose system in Escherichia coli, proteins; immunological studies of ,B-galactosidase and

thiogalactosidase transacetylase, 289.:I. (see bacteriophage), 341, 562LANNI, Y., MCCORQUODALE, D. J. & WILSON, C. M., Molecular aspects of DNA transfer

from phage T5 to host cells. III. Origin offirst-step-transfer DNA fragments, 19- (see MCCORQUODALE, D. J.), 10LARK, C. & LARK, K. G., Evidence for two distinct aspects of the mechanism regulating

chromosome replication in Escherichia coli, 120LARK, K. G. (see LARK, C.), 120LERMAN, L. S., Amino group reactivity in DNA-aminoacridine complexes, 367LEVIN, J. G. (see EISERLING, F.), 536LUZZATI, V., MATHIS, A., MASSON, F. & WITZ, J., Structure transitions observed in DNA

and poly A in solution as a function of temperature and pH, 28

M12 (see bacteriophage), 554, 557MCCORQUODALE, D. J. & LANNI, Y., Molecular aspects of DNA transfer from phage T5

to host cells. I. Characterization of first-step-transfer material, 10- (see LANNI, Y.), 19MACRAE, T. P. (see FRASER, R. D. B.), 147MAEDA, H. (see IKEDA, S.), 223MAGASANIK, B. (see HARTWELL, L. H.), 105MAHLER, H. R. & DUTTON, G., Nucleic acid interactions, V. Effects of cyolobuxine, 157MANDEL, H. G. (see MATUS, A.), 295MARKERT, A. R. (see HANCOCK, J. E. H.), 534MARTIUS, U. (see PARSONS, D. F.), 530MASSON, F. (see LUZZATI, V.), 28MATHIS, A. (see LUZZATI, V.), 28MATUS, A., RALPH, R. K. & MANDEL, H. G., Complexes of viral and ribosomal ribonucleic

acids, 295MELTON, C. W. (see TREHARNE, R. W.), 57Mercuric salts, solubilization effects on the structure of feather keratin, 199Messenger RNA synthesis patterns in mammalian tissues: analysis by counter-current

distribution, 187MILLER, A. (see FRASER, R. D. B.), 147MIURA, K. (see HAYASHI, H.), 345Molecular aspects of DNA transfer from phage T5 to host cells. I. Characterization of first-

step-transfer material, 10- - - -, III. Origin of first-step-transfer DNA fragments, 19MOMMAERTS, W. F. H. M. (see BRAHMS, J.), 73MS2 (see bacteriophage), 1, 412, 422MULLER-HILL, B., RWKENBERG, H. V. & WALLENFELS, K., The specificity of the induction

of the enzymes of the Lac operon in Escherichia coli, 303MUNRO, R. E. (see TRAUT, R. R.), 63Muscle, adductor, of the oyster Craseoetrea angulata, electron microscope studies of the

structure of the filaments, 89Mutant enzyme in Neurospora crassa interconvertible between electrophoretically distinct

active and inactive forms, 423

582 INDEX

Mutants, temperature-sensitive, asymmetric complementation in the replication ofbacterio­phage MS2, 412

Myoglobin and horse haemoglobin, ferrous, magnetic and optical properties under thereversible action of detergents, 475

Neurospora crassa containing a mutant enzyme interconvertible between electrophoret.i-cally distinct active and inactive forms, 423

NmENBERG, M. W. (see EISERLI~G, P.), 536Nucleic acid in solution, a study of the conformation by means of circular dichroism, 73Nucleic acid interactions. V. Effects of cyclobuxine, 157Nucleic acids, viral and ribosomal, complexes, 295Nucleotide sequence clusters in tho RXA of normal and RoUB sarcoma virus-infected

tissues, 381

Optical method for the analysis of periodicities in electron micrographs, and some 0 bserva­tions on the mechanism of negative staining, 565

PARSONS, D. F. & MARTIUS, D., Determination of the a-helix configuration of poly-yobenzyl-L-glutamate by electron diffraction, 530

PFEIFER, D., DAVIS, J. E. & SI~SHEIMER, R. L., The replication of bacteriophage MS2.III. Asymmetric complementation between temperature-sensitive mutants, 412

- (sco DAVIS, J. E.), 1Poly-y-benzyl-L-glutamate, determination of the a-helix configuration by electron

diffraction, 530Poly-S-carbobenzoxymethyl-I"-cysteine in solution, the ,a-structure, 223Polyadenylic acid and DXA in solution, structure and transitions observed as a function

of temperature and pH, 28Polyadenylic acids, methylated, synthesis and properties, 353'Polyheads' of '1'4 bacteriophage, structure, 570Polynucleotides inhibiting amino acyl RXA synthetase, 345Polypeptide chains, the number growing on reticulocyte polyribosomes, 202Polyribosomes and D:~A-dependentamino acid incorporation in Escherichia coli extracts,

536-, reticulocyte, the number of growing polypeptide chains, 202PREUSS, A. (see FUCHS, E.), 546Protein, ribosomal, from Escherichia coli, fractionation, 319-, selective in vitro inhibition by RNA of DNA-dependent amino acid incorporation, 359- synthesis inhibition, the effects on the replication of M12 phage RNA, 554- -, the relation of puromycin reaction, 63Protein-synthesizing systems from the cytoplasm and the chloroplasts of Euglena gracilis,

392Proteins of ribosome subunits and of encephalomyocarditis virus, electrophoretic separ­

ation,544- of the lactose system of Escherichia coli, ,a-galactosidase and thiogalactosidase trans­

acetylase, immunological studies, 289Protofibrils in ce-korat.in, 156Puromycin reaction and its relation to protein synthesis, 63

Radiophosphorus decay, its effect on cistron function in bacteriophage '1'4. I. Long-rangeand short-range hits, 488

RALPH, R. K. (see MATUS, A.), 295REESE, C. B. (see GRIFFI~, B. E.), 353Reovirus and wound tumour virus RNA, electron microscopy, 282Reticulocyte polyribosomes, the number of growing polypeptide chains, 202RXase destroying 30 sand 50 S ribosomes from Streptococcus pyogenes, 541

INDEX 583

Ribonuclease in urea solutions, the unfolding and refolding. 1. Rates and extents ofphysical changes, 225

- - - - II. The enzymic activity in urea and some states of unfolding, 263Ribonucleic acid bacteriophage M12, isolation and properties of an intact phage-specific

form, 557- - - - replication: studies of the fate of parental RNA, 519- - - from reovirus and wound tumor virus, electron microscopy, 282- - - infective, an in vivo specificity for its synthesis in the replication of bacterio-

phage MS2, 1- - - inhibiting selectively in vitro DNA-dependent amino acid incorporation into

protein, 359- - -, messenger, synthesis patterns in mammalian tissues: analysis by counter-current

distribution, 187Ribonucleic acid nucleotide sequence clusters of normal and Rous sarcoma virus­

infected tissues, 381- - - of bacteriophage M12, the effects of protein synthesis inhibition on the replica-

tion,554Ribonucleic acid of bacteriophage MS2, a modified method of assay, 422- - - of chloramphenicol, some abnormal properties, 508- - - polymerase particles, preparation and properties, 546- - - synthetase, amino acyl, inhibition by polynucleotides, 345- - - ribosomal, associated with the chloroplasts and the cytoplasm of Euglena gracilis,

403Ribosomal and viral nucleic acid complexes, 295- protein from Escherichia coli, fractionation, 319- ribonucleic acids associated with the chloroplasts and the cytoplasm of Euglena

gracilis, 403Ribosome subunit and encephalomycarditis virus proteins, electrophoretic separation, 544Ribosomes, 30 sand 50 S from Streptococcus pyogenes, destroyed by RNase, 541RICH, A. (see WARNER, J. R.), 202RICKENBERG, H. V. (see MULLER-HILL, B.), 303RaPPEL, R. M. (see TREHARNE, R. W.), 57ROTMAN, B. (see GANESAN, A. K.), 337Rous sarcoma virus-infected and normal tissues, RNA nucleotide sequence clusters, 381Roy, A. B., Possible allosteric effects with arylamine sulphokinase, 176

Sarcoma, Rous, virus, infected and normal tissues, RNA nucleotide sequence clusters, 381SAUERBIER, W., The role of cytosine photoproducts in ultraviolet inactivation of.bacterio­

phage Tl, 551- - & HAUG, A., An approach to determining the maximal contribution of thymine

dimer to ultraviolet inactivation of bacteriophage T4 v _ . _ ' 180SCHAFFER, F. L. (see KLEINSCHMIDT, A. K.), 282"Serine" enzymes, histidine sequences in the active centres, 183SINSHEIMER, R. L. (see DAVIS, J. E.), 1- - - (see PFEIFER, D.), 412- - - (see YOUNG, E. T.), 562SJOSTRAND, F. S. (see EISERLING, F.), 536SMILLIE, L. & HARTLEY, B. S., Histidine sequences in the active centres of some "serine"

enzymes, 183Sodium chloride, concentrated, and reversible inactivation in urea causing hybridization

of lactic dehydrogenase in vitro, 349SOFFER, R. L., Selective in vitro inhibition by RNA of DNA-dependent amino acid in-

corporation into protein, 359SP82 (see bacteriophage), 438SPENDLOVE, R. S. (see KLEINSCHMIDT, A. K.), 282STENT, G. S. (see HARRIMAN, P. D.), 488STRAUSS, J. H., Jr. A modified method of MS2-RNA assay, 422

584 INDEX

Streptococcus pyogenes, destruction by RNase of 30 8 and 508 ribosomes, 541STRETTON, A. O. W. (see FINCH, J. T.), 570Sulphokina.ae, aryla.mine, producing possible allosteric effects, 176SUNDARAlII, T. K. & FINCHAM, J. R. S., A mutant enzyme in Neurospora eraesa inter­

convertible between electrophoretically distinct and inactive forms, 423

Tl (see bacteriophage), 551T4 (see bacteriophage), 488,570T4,,-._ (see bacteriophage), 180T5 (see bacteriophage), 10, 19, 212Thiogala.ctosidase transa.cetylase and tl-galactosidase, proteins of the lactose system of

Escherichia coli, immunological studies, 289Thymine dimer, an approach to determining the maximal contribution to ultraviolet

inactivation of bacteriophage T4._._, 180TIlITANY, M. L. & :K.B.not:, S., Studies on the structure of feather keratin. IV. Solubiliza­

tion effects of mercuric salts, 199TRAUT, R. R. & MUNRO, R. E., The puromycin reaction and its relation to protein syn­

thesis,63TREHARNE, R. W., MELTON, C. W. & ROPl'EL, R. M., Electron spin resonance signals and

cell structure of Ohorella pyrenoidosa grown under different light intensities, 57

Ultraviolet inactivation of bacteriophage Tl, the role of cytosine photoproducts, 551- - - - T4,,-.-, an approach to determining the maximal contribution of thymine

dimer, 180Urea, reversible inactivation by, causing hybridization oflactic dehydrogenase in vitro, 349- solution in which ribonuclease is unfolding and refolding. 1. Rates and extents of

physical changes, 225- - - - n. Enzymic activity in urea. and some states of unfolding, 263

Vaccinia DNA, the replication and coating, 452Viral and ribosomal nucleic acid complexes, 295Virus, encepha.lomyoca.rditis, and ribosome subunit proteins, electrophoretic separation,

544- molecules icosahedral symmetry and Sir William Hamilton's icosian game, 534-, reo and wound tumor, RNA, electron microscopy, 282-, Rous sarcoma, infected and normal tissues, RNA nucleotide sequence clusters, 381

WALLENFELS, K. (see MULLER-Hn.L, B.), 303WALLER, J. P., Fractionation of the ribosomal protein from Escherichia coli, 319W ABNER, J. R. & RICH, A. The number of growing polypeptide chains on reticulocyte

polyribosomes, 202WHITCOMB, R. F. (see KLEIN80ID1:IDT, A. K.), 282WILSON, C. M. (see LA:Nm, Y.), 19Wrrz, J. (see LUZZATI, V.), 28WORK, T. S., Electrophoretic separation of the proteins of ribosome subunits and of

encephalomyocarditis virus, 541Wound tumor virus and reovirus RNA, electron microscopy, 282

YOUNG, E. T. & SIN8HEIMER, R. L., Novel intra-cellular forms of lambda DNA rr, 562

ZABIN, I. (see BERG, A.), 289ZILLIG, W. (see FUCHS, E.), 546