754 



SUBJECT INDEX 



z-Inositol, 322 



L-Inositol, vitamin activity of, 352-353 



TOCSO-Inositol, 322, 338 



occurrence of, 334-335 



synthesis of, 338 

 mwo-Inositol, 323, 324, 338 

 jnyo-Inositol, 322, 323, 324 



bound forms of, 345-347 



requirement for, 342 

 Inositol hexaacetate, utilization of, 350 

 Inositol monophosphate, 



absorption of, 350 



vitamin activity of, 352 

 Inosituria, relation to polyuria, 374—376 

 Inososes, 363 



naming of, 326 

 Insects, 



fatty acids and, 291, 298, 313-314 



niacin and, 533 

 Insulin, 



in discovery of choline, 100 



niacin and, 575 



relation to choline, 19 

 Intestinal disease, 



effect on vitamin D absorption, 259 



in vitamin K deficiency, 425 

 Iodine trichloride, in vitamin D estima- 

 tion, 217 

 Iodine value, 273 



of unsaturated fatty acids, 288-289 

 lodinin, vitamin K and, 439 

 lodoacetic acid, 17 

 Isocinchomeronic acid, 521 

 Isocitric acid, 500 



in carbon dioxide fixation, 504 

 Isocitric dehydrogenase, 



coenzyme of, 493 



in triphosphopyridine nucleotide es- 

 timation, 511 

 Isoergosterol, 199 



Isomytilitol, vitamin activity of, 352 

 Isonicotinic acid, formation of, 473 

 Isoprene, derivation of, 625 

 Isopyrocalcif erol , 



as provitamin D, 144 



formation of, 142 



K 



7-Ketocholesterol , 

 occurrence in body, 159 

 synthesis of, 147 



7-Ketocholesteryl acetate, 140, 206 

 a-Ketoglutaric acid, 



in coenzyme A assay, 603 



insulin and, 575 



oxidation of, 622, 625 



pyridine nucleotides and, 502 

 Ketones, excretion of, 86 

 Kidney, 



in choline deficiency, 64-67 



in fatty acid, deficiency, 298-299 



in hypervitaminosis D, 264 

 Kwashiorkor, choline and, 104 

 Kynurenic acid, formation from tryp- 

 tophan, 526 

 Kynurenine, in niacin synthesis, 525, 

 526-527, 533 



Lactalbumin, effect in choline deficiency, 



78 

 Lactation, 



choline and, 92, 103 



niacin and, 565 



vitamin D requirement in, 260 

 Lactic acid, 



formation from inositol, 349 



pyridine nucleotides and, 498-499 

 Lactic dehydrogenase, 510-511 



coenzyme of, 493 



inhibition of, 508 



in keto acid oxidations, 503 

 Lactobacillus arabinosus, in niacin as- 

 say, 539 

 Lactobacillus bulgaricus factor, 605 



pantothenic acid and, 613 

 Lactose, relation to choline, 68, 70 

 Lanolin, as provitamin D, 163 

 Lapachol, vitamin K and, 397 

 Latex, synthesis of, 625 

 LBF, 16, see also Panteth(e)ine, Lacto- 

 bacillus bulgaricus factor 

 LCF, see Citrovorum factor 

 Lecithin, 2, 3, 9, 43 



arsenocholine and, 94 



choline and, 45, 68 



choline oxidase and, 36 



hydrolysis of, 5 



in growth of Neurospora, 55 



lipotropic effect of, 19-20 



synthesis of, 48-49, 52, 70, 72 



turnover, 99 



