SUBJECT INDEX 



987 



Dixippus morosus, 183, 185 



DNA, 260, 509, 612 



— , bacterial transformations by, 268 



— content in gastrula of Rana pipiens, 

 362 



of lymphoma, 905 



in nuclei, 157 



of tumor cells, 157 



— depolymerization by nitrogen mustard, 

 271 



— , depolymerization of — by X-radiation, 



272 



— , distribution of newly synthesized — in 

 mitotic division, 913 



— , doubling of the amount of — , immedi- 

 ately after telophase, 340 



— , Feulgen reaction for, 262 



— , genetic activity of, 268 



— gradient in epithelium, 687 



— and growth, 265 



— , metabolic stability of, 266 



— in methylcholanthren induced mouse 

 cancer, human epidermoid carcinoma 

 and hyperplastic lesions, 687 



— as organizer for RNA synthesis, 278 



— in plant cell nuclei caused by auxin or 

 kinetin, 774 



— potassium ration in azo dye induced 

 hepatomas, 905 



— precursor, 340 



— precursors in unfertilized eggs, 288 



— , purine and pyrimidine composition of — 

 of cancerous tissues, 902 



— , relationships between hereditary pitui- 

 tary dwarfism and formation of multiple 

 — classes, 912 



— or RNA synthesis, relation between re- 

 spiratory balance and, 888 



— and RNA in tumor cell nuclei, 904 



— as self-duplicating mechanism, 262 



— , specific activity of — and RNA nucleo- 

 tides in tumors, 909 



— structure, Watson and Crick's, 261 



— synthesis, rapid — — in late blastula 

 stage, 287 



in blocked embryos, 293 



, dissociation between and devel- 

 opment, 293 



, effects of physical and chemical 



agents, 271 



— — , immediate inhibition of — — by 

 ultraviolet light, 294 



, independence of and protein 



synthesis, 293 



during mitosis, 269 



in first part of interphase, 270 



DNA, synthesis of — and RNA during 



development, 285 

 — , ultraviolet radiation modifications, 271 

 DNAj: DNA2 ration in tumors, 906 

 DNAP, 576 

 DNase, 295 

 DNA-T (DNA-thymine), 103 



— synthesis, mechanism, 103 



, deoxyribonucleoside metabolism 



and , 104 



DNP (2,4-dinitrophenol), 785 

 DOC (deoxycortisone), 12 

 DOCS (deoxycorticosterone), 631 

 Donaldson's tables, 235 

 DOPA, 25 



— activity of human melanomas, 914 

 dorsal convergence, 342 



dorsalization exerted by ammonium on the 



ectoblast, 422 

 dorso-ventral hierarchy of the organs, 350 

 DPN-cytochrome c reductase in tumors, 



885 

 — , tumor requirement for additional — , 



— , quinone mediated oxidation of, 24 

 DPN^ (diphosphopyridine nucleotide) 9, 



115 



— /DPNH, ratios in tissues, 18 

 , in neoplastic tissues, 894 



— mechanism of oxidation of — by lactic 

 acid, 14 



— or TPN"^ reduction by plant 

 chloroplasts, 33 



— in tumors, oxidized and reduced, 884 

 DPNase and ATPase activity in tumor 



mitochondria, 895 

 DPNH, 12 



DPNH-cytochrome c reductase, 19 

 DPNH2, oxidizing enzyme system, 20 

 — , reoxidation, 19, 20 

 DPNH2 or TPNH2 reoxidation by plant 



mitochondria, 33 

 Dreissensia polymorpha, 184 

 Drosophila, 271, 315, 499. 515, 734, 848, 



863 



— larvae, salivary glands of, 273 

 Dubois' cephalization factor, 251 

 Dubois formula, 181 



duck virus, 858 



ductus endolymphaticus, 395 



Dufour effect, 153 



Dugesia gonocephala, 184 



Dupuytren's contracture, 683 



duration of life, 953 



dyad, 328 



dynamic state of the organism, 147 



