SUBJECT INDEX 



1033 



Intestinal mucosa, cholesterol absorption 

 in, 365, 369 

 synthesis in, 391, 398 

 fat absorption in, 2 



synthesis in, 17, 50 

 phj'tase in, 669 



vitamin A ester ification in, 451 

 Intestinal wall, cholesterol esterase in, 363 

 esterification of vitamin A in, 450, 451 

 glycerol synthesis in, 45 

 phospholipid synthesis in, 51 

 retinene to vitamin A in, 451 

 vitamin A in, 433, 437-440, 455, 456 

 vitamin D in, 655, 657 

 Intestine, alcohol dehydrogenase in, 452 

 carotenoids absorption from, 425 

 cholesterol in, 418 

 excretion, 412, 415 

 synthesis, 394, 397, 398 

 transformations, 369, 410 

 turnover, 405 

 dehydrogenase in, 119 

 phospholipid synthesis in, 51, 53, 54, 59, 

 190 

 effect of fat, 59 



of phlorhizin, 61, 62 

 provitamins transformation in, 437-440 

 reexcretion of Ca, P in, 663 

 riboflavin sj^nthesis, 881 

 vitamin A esterase in, 433 

 vitamin A transformation in, 432, 433 

 vitamin D in, 656 



effect of Ca absorption, 663-665 

 volatile acids in, 255 t 



Intramuscular fat, 5, 43 

 Intravenous administration of fat, 203- 



207 

 Invertebrates, carotenoids in, 476-495 

 provitamin D in, 629, 630, 631, 636 

 lodoacetamide, enzyme inhibitor, 107 

 lodoacetate, effect on aoetylation, 265 



on fatty acid dehydrogenation, 117, 



118 

 on formylation, 281 

 lodobenzene, 267, 345 

 lodopsin, 451-452, 460, 570, 574, 601 

 lodosobenzoate, enzyme inhibitor, 107 

 Iris, carotenoids hi, 505, 512, 514 



Iron, effect on phospholipid utilization, 238 

 Irradiation, and vitamin D3 production, 



410 (see also X-ir radiation) 

 Iso-alkylbenzenes, metabolism of, 344 

 Isocarotene (see Dehydro-0-carotene) 

 Isobutyl alcohol, glucose from, 300, 302 

 Isobutylbenzenes, 344 

 Isobutyric acid, 79, 82, 135, 262 



utilization, 299, 302 

 Isocaproic acid, from cholesterol, 405 



oxidation, 79 



utilization, 299 

 Isocitric acid, 171, 274, 277, 305, 306 



from acetate, 271, 278 

 Isocrotonic acid, dehydrogenation, 117 

 Isocrj'ptoxanthin, 532 

 Isocrj'ptoxanthin methyl ether, 532 

 Isoleucine, cholesterol biosynthesis and, 

 382, 383 



or-hydroxy acid and, 301 



ketogenicity of, 134, 273 



metabolism, 294, 300 

 Isolinolenic acid, 799 (see also y-Linolenic 

 acid) 



biopotency of, 815 

 Isolinusic acid, 800 



Isoprenoid units, in cholesterol biosynthe- 

 sis, 384-388 

 Isoprocalciferol, as provitamin D, 627 

 Isopropyl alcohol, carbon fixation by, 182 



from acetone, 182 

 Isopropyl residue, in cholesterol biosj-n- 



thesis, 383-387 

 Iso-a retinene, 574 

 Iso-b retinene, 574 

 Isorhodopsin, 575 

 Isotope dilution technic, and acetate pool, 



256, 257 

 Isovaleric acid, acetate from, 258, 259 



cholesterol biosynthesis, and, 383-387 



ergosterol from, 416 



ketogenicity of, 130-132, 260 



utilization, 299 

 Isovaline, acetyl groups fi'om, 262 



ketogenicity of, 135 



Japanese ishinagi, 325 



