I0I4 



SUBJECT INDEX 



proteins, modifications in chromosomal — , 



518 

 — , non-centrifugable, non-particulate — , 



514 

 — , non-sedimentable, 514 

 — , organ-specific, 450 

 — , peptide bond formation in the 



incorporation of amino acids into — , 44 

 — , pH 5.2 — , 45 



— , phenylalanine as precursor of — , 296 

 — , role of — as energy source, 726 

 — , SH-groups linked to — , 289 



— in tissue cultures, measurement of 

 total —,577 



proteolysis, increased — in regressing can- 

 cerous growth, 61 1 

 proteolytic activity in human tumors, 913 

 increase in regeneration, 608 



— degradation of implants, 290 



— enzymes, 61 1 



activity reduced by formalin, 422 



, correlation between content of 



protein turnover and growth capacity, 



166 



in tumors, 

 , use of 



for separation of tissues, 

 digestion, 291 



537 

 — , inductors to 

 Proteus, 442 



— vulgaris enzymes, 64 

 prothallus, 771 



prothoracic hormone of insects, 635 

 protoanemonin as seed germination 



inhibitor, 785 

 protocatechuic acid, accumulated in 



Neiirospora mutants, 67 

 protochordates, 327 

 protofibrils, 691, 694 

 protopectin, 796 

 protoplasm, 138 

 — , undifferentiated, 141 

 protoporphyrin, 88 

 — , crystalline — from chloroma extract, 



915 



— synthesis from 8-aminolevulinic acid, 90 

 Protozoa, 590 



— , cell size and temperature in — , 217 

 — , kinetosome system of ciliate — , 641 

 — , nitrogen metabolism, 725 

 proximo-distal axis of the limb, 458 

 Pseudemys, 466 

 Pseudomonas, 10, 62 



— aeruginosa, 24 



— , reduction of nitrite in — , 23 



— saccharophila, metabolism of 

 6-phosphogluconate by — — , 53 



pteroglutaniic acid, 120 



PT inductor, typical induction of an 



acrencephalon by the — , 438 

 pubertas praecox, 245 

 puberty, second rise of growth rates at — , 



248 

 Pugettia producta, 185 

 pulmonary tumor induced by the 



administration of urethane, 857 

 Pulvertaft-Harris method, 553 

 purine degradation, formimino-glycine 



intermediate in , 58 



— metabolism in neoplastic cells, 908 



— analogues, 930 



— composition of DNA in tumor tissue, 

 902 



— , conversion of — ribosides to nucleo- 

 tides, 97 



— synthesis, de novo, 91 

 purines, 729 



— , yeast mutants requiring — for growth, 



509 

 — , labelled, 95 

 — , utilization of free — , 95 

 putrescine, 946 

 pyknosis, 159 

 pyocanin decreasing mitosis in 



fibroblast culture, 886 

 pyridine nucleotide dehydrogenase, 7 

 dehydrogenases in amino acid 



oxidation and sterol synthesis, 9 



and dismutation reactions, 15 



linked glutathione reductase 



enzymes in plants and animal tissues, 25 



linked reductases of Neurospora, 23 



transhydrogenase, electron transfer 



via — , 30 



— nucleotides, 33 



, reoxidation of reduced via the 



cytochrome system, 16 

 pyridoxal phosphate, 84, 114 

 as co-factor in glycine and serine 



interconversion, 59 

 as co-factor in transamination 



reactions, 84 

 and folic acid derivatives in serine 



and glycine interconversion, 58 

 pyridoxal-5-phosphate as co-enzyme, 762 

 pyridoxamine, 34, 84 



— as cofactor in transamination reactions, 

 84 



— phosphate, 34 



pyridoxine content of adenocarcinoma, 



915 



— promoting skin-healing in rats, 630 

 pyrimidine, 729 



