INDEX 



741 



"Uniformity, vitamin," in tissues, 27 

 Universal distribution of B vitamins, 19- 

 20 



reason for, 98 

 Unknown factors, inhibition analysis in 



assay development for, 473 

 Unsaturated fatty acids, formation of, 



227 

 Urease, from jack-bean meal, 96 

 Urinary specimens, 



B vitamins in, 252, 254-257 



pantothenate in, 259 

 Urine, 



excretion of B vitamins in, 364-368 



nicotinic acid products in, 356-361 



other vitamin products in, 365 



"V" factor activity, 608-609 

 Variability, 



individual, 255, 369-370 



species, 264 



strain, 264 

 Variables in human experiments, 249 

 Variation, individual in thiamine require- 

 ments, 273-274 

 Venom, snake, 148 

 Verdoperoxidase, 184 

 Vertebrates, B vitamin requirements of, 



318-330 

 Viruses, B vitamin requirements of, 307 

 Virus-induced tumors, 28 

 Vitamin A, 



distribution, 22 



interrelation to thiamine, 282 

 Vitamin assays (see assay methods, in- 

 dividual vitamins) 

 Vitamin B 



biosynthesis, 78 et seq. 234-235 



content of various materials, 254, 257- 

 259 



end products of, 256 



levels in feces, 256-257 



studies in excretion of, 254-257 



Vitamin Bi (see thiamine) 



Vitamin B 2 (see riboflavin) 



Vitamin B 3 (see pantothenic acid) 



Vitamin Be (see pyridoxine, pyridox- 

 amine, and pyridoxal) 



Vitamin Bu> (see antipernicious anemia 

 vitamin) 



Vitamin B13, 16 



Vitamin Bi 4 , 16 ff, 203 



Vitamin B c conjugase, 203 



Vitamin B c conjugate, 40 



Vitamin Be coenzyme, 



assay methods, 178 



biosynthesis, 179-180 



coenzyme for glutamic-aspartic system, 

 182 



coenzyme for glutamic-alanine system, 

 182 



condensations with, 189 



in reactions of methylene groups, 183 



in transaminations, 176 



inhibition studies, 180 



mechanism of action, 186 



occurrence, 179 



reactions catalyzed by, 180 et seq. 



relation to bacterial amino acid re- 

 quirements, 184 



sources, 179 



structure, 177 

 Vitamin C (see ascorbic acid) 

 Vitamin D, 22 



Vitamin E (see tocopherols) 

 Vitamin G (see riboflavin) 

 Vitamin H (see biotin) 

 Vitamin K, 23 



Vitamins required in enzymatic reac- 

 tions, 104-105 

 "Vitamin-uniformity" in tissues, 27 



Warburg's coferment, 133 



Water content of cancer tissues, 27 



Water solubility of B vitamins, 30 



Weed killers, action of, 398 



Weight, effect on B vitamin require- 

 ments, 266 



Wernicke's disease, 400, 402 



Work, effect on B vitamin requirements, 

 267 



Worms, B vitamin requirements of, 308 



Xanthine, uric acid from, 149 

 Xanthine oxidase, 148, 296 

 Xanthopterin, 285, 288 



folic acid activity of, 421 



effect in anemias, 573-574 

 "Xanthopterin oxidase," 203, 296 

 Xanthurenic acid excretion, 314 



Yeast, 



availability of thiamine in, 291 



diaphorases from, 149 



DPN from, 135 



effect on dietary thiamine, 291 

 Yeast fermentation tests, 384 

 Yellow enzyme, 96 



Zwischen ferment, 132 

 Zymase, 154 



