INDEX 



207 



Nomenclature, remarks on — in 

 sequence analysis of nucleic acids, 

 131-132 



Nuclei of rat liver, nucleotide ratios 

 in ribonucleoprotein, 119 



Nucleic acid(s), see also deoxyribose 

 nucleic acid(s) and pentose nucleic 

 acid(s) 



— , absence of repeating polynucle- 

 otide units, 51, 72 



— , biological role of — and of 

 nucleoproteins, 26, 73 



— , brief listing of relevant informa- 

 tion on the biological roles of 

 the — , 71-72 



— , as carriers of biological infor- 

 mation, 73, 100-107 



— , depolymerizing enzymes, 18-20 



— , diversity, nucleotide sequence 

 and periodicity in — chain, 31, 

 32, 33, 105-106, 119 



— , exclusion of degradation by 

 enzymes, acid or alkali, in isola- 

 tion, 6 



— , invariability, 104-105, 120 



— , isolation, 6 



— , meaning of regularities in com- 

 position, 93-96 



— , methods for analysis of nucleo- 

 tide composition, 6-11 



— , methods of hydrolysis, 10-11 



— , principal constituents, 85, 86 



— , reaction with chemicals and 

 mutagenic effects, 71 



— , reflections on possible role of 

 DNA in transmission of inherited 

 properties and of pentose — in 

 differentiation, 21, 22 



— , remarks on functions, 70-74 



— , remarks on nomenclature in 

 sequence analysis, 131-132 



— , role of proteins in function 

 of _, 73, 74 



— , separation at the nucleoprotein 

 stage, 68 



— , some immediate problems in the 

 chemistry of — , 167, 168 



Nucleic acid(s) (continuation) 



— , structure and function of — as 



cell constituents, 25-36, 70-74 

 — , — and sequence of nucleotides, 



90 

 — , sugar components, 18, 53, 65, 



84 

 — , ultraviolet absorption spectrum 



and mutagenic action spectrum 



of ultraviolet radiation, 71 

 — , urgency of sequence analysis, 73 

 Nucleohistone(s), 41, 64, 79 

 — , bonds between nucleic acid and 



histone, 41 



— of calf thymus, isolation, 42 



— , fractional dissociation of calf 

 thymus — and of wheat germ 

 nucleoprotein, 46, 89 



— , fractionation of nucleic acids 

 in — by exposure to increasing 

 NaCl concentrations, 44, 45, 65 



— , nucleic acid content in — , 43 



— , properties of calf thymus — 

 solutions at different NaCl con- 

 centrations (table), 44 



— , solubility, 43 



Nucleoprotamines, 41 



— , bonds between nucleic acid and 

 protamine, 79, 80 



— , dissociation in strong salt solu- 

 tions, 43, 45 



— , phosphorus to arginine ratio, 43 



— from sea-urchin sperm, isola- 

 tion, 42 



Nucleoproteins, see also ribonucleo- 

 protein(s) and deoxypentose nu- 

 cleoprotein(s) 



— , absorption spectrum in the ul- 

 traviolet, 43 



— , artificially prepared complexes 

 of nucleic acids with positively 

 charged histone, globin and syn- 

 thetic polylysins and polyvinyl- 

 amine, 45-49, 57, 58 



— from avian tubercle bacilli, iso- 

 lation, 42 



— , bonds between nucleic acid and 

 protein, 64, 79, 80 



