982 



SUBJECT INDEX 



chloroplasts, photosynthesis by, 33 



6-chloropurine inhibiting mitosis in 

 cultures of mouse sarcoma 180, 933 



A''-cholestenol, concentration of — in mouse 

 skin reduced by carcinogenic hydrocar- 

 bons, 881 



cholestenone, 12 



cholesterol, structure, 1 10 



— synthesis, 26 



cholic acid, activation, 40 



choline biosynthesis from serine and 



ethanolamine, 106 

 — , effect of — chloride on regeneration, 



631 



— formation, 106 



— kinase, 38 



— , oxidation, 2 1 



— oxidation by rat liver mitochondria, 21 

 cholinesterase, 525, 533, 621 

 cholyl-CoA, condensation with taurine to 



taurocholic acid, 40 

 chondroblasts, 693 

 chondrogenesis, 453 

 — , axial, 462 

 chondrogenic influence of chick 



notochord, 461 

 chondroitin sulfuric acid. 534 

 chorda, 342 

 chordal islets in the neuroepithelium, 413, 



477 

 chordalization of neuroepithelium as 



result of centrifugation of frog blastula, 



414 

 chordamesoderm, 538 

 Chordates, 468 

 chordencephalon, 367 

 chordomesoblast, 319 



— graft, 385 



— , inductive action, 391 



— , selective induction of, 445 



chordomesoderm, explanted, 291 



chorion, 322 



— , zona striata in the, 314 



chorionallantoic membrane of chick 



embryo, injection of ethionine into the, 



503 

 choroid, formation of the, 452 

 chromatin, RNA in, 264 

 Chromobacteriiim, 442 

 chromophobic pituitary tumors, 835 

 chromosomal abnormalities, aspartic acid 



producing, 937 



— agglutination caused by toxic 

 materials, 938 



— bridging and breaking in cultures of 

 mouse sarcoma 180 by 



fluorphenylalanines, 938 

 chromosomal erosion caused by adenine 

 and maleic hydrazide, 940 



— histone, 927 



— proteins, modifications in, 518 



— reduplication, concepts of the 

 mechanism of, 913 



chromosomes, 307 



— , adenine causing structural — changes, 



939 

 — , breakage by aminopterin, 



a-methopterin, aminoamfol, 939 

 by 2,6-diamino-9-p-D- 



ribofuranosylpurine, 941 



by 8-ethoxycaffeine and X-rays, 940 



— , poisoning of, 937 

 — , polytene giant, 158 



— reduplication and genetic activity, 260 

 — , "stickness" in, 937 



chromotrope granules as mobilisers of meta- 

 bolic resources, 340 



, relationship of the of the egg 



to initiation of development and beginning 

 of cleavage, 340 



chymotrypsin, 478 



— as inhibitor of induction, 290 

 cicatrisation, index of, 604 

 Ciliata 591 



cinnamic acid, 764 



cirrhosis, correlation of — with hepatic car- 

 cinogenesis in man, 866 

 cirrhotogenic agents, 866 

 citrate as intermediate of Krebs cycle, 680 

 citric acid, 572 



— cycle, see tricarboxylic acid cycle 



in liver tumor, 889 



citrovorum factor, 93 



, 2,6-diaminopurine blocking conver- 

 sion of folic acid to, 933 

 citruUine, 41 

 Cladocera, 966 

 clasmatocytes, 688 

 Clavelina, 604, 628 

 cleavage and morphochoretic pattern, 325 



— and nitrogen metabolism, 716, 721 

 cleidoic eggs, nitrogen metabolism in, 738 



— embryo, 715 

 clonal lines of cells, 549 

 closed system, 144 

 Clostridium enzymes, 58 

 Clostridia, heterotrophe, 81 

 Clostridium HF, 1 2 1 

 Clostridium Kluyveri, 1 1 



Cliipea harengus, growth curve of, 955 



coadaptation, 245 



coal tar as tumor-inducing agent, 858 



