736 



INDEX 



"Phosphoryl-acetyl intermediate — Cont'd 



origin of, 191 



role in fatty acid metabolism, 225 

 Phosphorylases, 157 

 Phosphorylation, 



in glycolysis, 219 



of B vitamins, 343-344 

 Photosynthesis, 237-238, 337 

 Phototrophism, 337 

 Phycomyces test, 80, 384 

 Phyla, pantothenate in various, 19-20 

 "Physical fitness," 245 

 Physiological interrelationships of B vita- 

 mins, 378-379 

 Physiological level, 377 

 Physiological requirements, 264 

 Phytic acid, 38 

 Phytin, 38 

 /3-Picoline, 286-287 

 Pigs, pellagra in, 412 

 Pimelic acid, 



as biotin precursor, 88 



effect on biotin production, 88 

 Pituitary gland, 380 

 Placebos, use of, 249 

 Plant cuttings, B vitamin requirements 



of, 316 

 Plant embryos, B vitamin requirements 



of, 307, 316 

 Plant roots, B vitamin requirements of, 



307, 316 

 Plants, green, 



absorption in, 336-337 



B vitamin deficiencies in, 397 



digestion in, 336-337 



distribution of B vitamins in, 337 



excretion of B vitamins in, 336-338 



metabolism of B vitamins in, 336-338 



origin of B vitamins in, 337 

 Plant tissues, 



aldehyde-oxidases in, 148 



amino acid requirements of, 316-317 



B vitamin requirements of, 316-318 



mitotic rates of, 379 

 Plasmochin, 680 

 Platyhelminthes, B vitamin requirements 



of, 308 

 Poising agents, enzyme activators as, 110 

 Poisons, heavy-metal, 153 

 Pollen grains, B vitamin requirements of, 



316 

 Polyneuritis, nutritional, 400 



time required for development, 264 



with chronic alcoholism, 400 

 Polysaccharides, synthesis and cleavage 



of, 217 et seq. 

 Porifera, nutrition of, 308 

 Porphyrins, 



as growth factors, 716 



as inhibitors, 716 



B vitamin-like properties of, 151 



biological activity, 716-720 



Porphyrins, — Continued 



role of single carbon unit in biosyn- 

 thesis of, 235 

 Potassium, 



effect of androgens on retention of, 381- 

 382 



relation to biotin deficiency, 249 

 Potency of B vitamins, 283 

 Potentials, 



actual, 131 



redox, 130 



standard, 131 

 Precursors of B vitamins, 284 

 Pregnancy, 



anemia in, 419 



effect on B vitamin requirements, 268 

 Premenstrual tension, B vitamin treat- 

 ment of, 382 

 Primitive tribes, deficiencies in, 296 

 Prison camps, dietary surveys in, 252 

 Procaine, effect on sulfonamide therapy, 



486 

 Processing of food, effect on B vitamin 



content of, 282 

 Products of B vitamins, 284 

 Prontosil, 481 



Prosthetic groups, classification of, 109 

 Protein-complex, preparation of, 120-121 

 "Protein-complexes," 116 

 Proteins, 



effect on B vitamin requirements-, 276 



effect on pyridoxine requirements, 278 



effect on riboflavin requirements, 277 



synthesis and hydrolysis of, 230 et seq. 

 Protogen, 16 



Protozoa, B vitamin requirements of, 307 

 "Pseudopyridoxine," 654 

 Pterins, effects in anemia, 573-574 

 Pteroylglutamic acid, 9, 39-40 

 Pteroylheptaglutamate, 290 

 Pupation, B vitamin requirements for, 311 

 Purines, catabolism of, 234 



folic acid in synthesis of, 201 



incorporation of single carbon unit 

 in, 196 



PABA in synthesis of, 201 



vitamins required in synthesis of, 233- 

 234 

 Putrescine, 181 

 a-Pyracin, 421 

 0-Pyraein, 421 



Pyramin, excretion of, 255, 369 

 Pyridine derivatives, excretion of, 389 

 Pyridoxal (see also pyridoxine, Vitamin 

 B 8 coenzyme) 



analogues, 658-659 



assay methods, 59-61 



biological activity, 655, 656 



dissociation constants of enzymes of, 

 180 



isolation, 654 



phosphate, 7, 36, 178 



