206 



INDEX 



Identity and diversity in high-mo- 

 lecular cell constituents, 2-5 



, is there a critical range 



of molecular weights as for abili- 

 ty of cells to synthesize complete- 

 ly identical substances?, 5 



Information, see biological informa- 

 tion 



Information theory, 113 



Invariability of nucleic acids, 104- 

 105 



— within the species, 120 

 5-Iodouracil, incorporation into 



DNA, 152, 154 

 Isolation of nucleic acids, exclusion 

 of degradation, 6 



Lipoproteins, nature of bonds be- 

 tween lipid and protein, 80 

 — , specific patterns, 80, 113 

 Liver, nucleic acids, 11, 12, 14, 15, 

 17, 93 



Macromolecular structure, the prob- 

 lem of the — of the native state 

 of DNA, 129, 130 



Magnesium ions, effect on fractional 

 dissociation of artificial complex- 

 es of histone with calf thymus 

 DNA, 48 



— requirement by deoxyribonucle- 

 ases, 6 



Mechanomorphic concept in bio- 

 chemical conceptions of cell life, 

 103 



— of living nature, 111, 175 

 6-N-Methyladenine, 86, 153 

 Methylcytosine-cytosine units in rye 



germ DNA, 157 

 5-Methylcytosine, amount in DNA 

 of wheat and rye germ (table), 

 139 



— distribution in fractions of calf 

 thymus DNA (table), 56 



— in DNA of E. coli phages, 66 

 — , frequency of — and cytosine as 



solitary and bunched nucleotides 

 in DNA, 152 



5-Methylcytosine, frequency of — 

 (continuation) 



— , — and thymine as solitary nu- 

 cleotides in DNA, 152 



— , high proportion linked to gua- 

 nine in a dinucleotide as compared 

 with cytosine in various DNA's, 

 56, 157 



— , occurrence, 86 



— , percentage contribution to ami- 

 nopyrimidine content in various 

 fractions of DNA, 151 



— in structure analysis of nucleic 

 acids, 139-141 



— in wheat germ DNA, 52, 55, 139 

 Minimum of signaling potential in 



biological information, 117 



— of viable organization, 117 

 Models and model experiments, re- 

 flections on — , 53, 77, 83, 95, 

 174, 186, 187 



Molecular weights of DNA, 5, 88, 

 128, 165 



Morphogenesis, role of RNA, 22, 71 



Mutagenic action spectrum of ultra- 

 violet radiation and absorption 

 spectrum of nucleic acids, 71 



Mutagenic effects of chemicals 

 which react with nucleic acids, 71 



Mycobacterium phlei, nucleotide 

 ratios in RNA, 69, 94, 119 



Mycobacterium tuberculosis (bo- 

 vine), nucleotide ratios in RNA, 

 119 



Native DNA, preservation of native 

 state, 129 



Native state of nucleoproteins, cri- 

 teria, 42, 43 



Neighbor principle, high tendency 

 of methylcytosine to be next to 

 guanine in DNA's, 157 



— in nucleotide sequence in nucleic 

 acids, 153-158 



— in soluble RNA of liver cyto- 

 plasm, 157 



— in structure of calf thymus DNA, 

 72 



