SUBJECT INDEX 



763 



occurrence of, 136 



relation to ergosterol, 157-158 

 Sitosterol dibromide, 139 

 Skin, 



in fatty acid deficiency, 300, 301-302, 

 309-310 



in pellagra, 562 



pantothenic acid and, 671 

 Skull, deformation in rickets, 238 

 Sodium acetyl salicylate, vitamin K and, 



435 

 Sodium ethjdate, in vitamin K estima- 

 tion, 414 

 Sorbitol, 344 



oxidation of, 348 

 Sphingomyelins, 2 



choline and, 58-61 



turnover, 99 

 Sphingosine, 2 



in choline deficiency, 98 



reaction with choline, 58-61 

 Sphingosylphosphorylcholine, 8 



oxidation of, 19 

 Spinal cord, in pantothenic acid defi- 

 ciency, 660 

 Spinasterol, 136 

 Sprue, vitamin K and, 425, 448 

 Stearic acid, effect on choline oxidase, 36 

 Sterols, chemistry of, 133-137 

 Stigmasterol, 135, 136 



dehydrogenation of, 146-147 

 Stilbestrol, vitamin K and, 440 

 Streptamine, 327 



relation to inositol, 363-365 



structure of, 328-329 

 Streptomycin, 



pantothenic acid requirement and 

 685-686 



reversal of inhibition by, 365 

 Stress, 



in fatty acid deficiency, 294-295, 297 



pantothenic acid and, 673, 686-687 

 Stress reaction, in pantothenic acid de- 

 ficiency, 651 

 Strychnine, niacin and, 577 

 Succinic acid, effect on choline oxidation, 



35 

 Succinic anhydride, reaction with coen- 

 zyme A, 608 

 Succinic dehj^drogenase, inhibition of, 

 508 



Succinoxidase, 



ethionine and, 39 



in fat deficiency, 277 



vitamin K and, 438 

 Succinylsulfathiazole, pantothenic acid 



and, 685 

 Succinyl transfer, coenzyme A and, 622 

 Sucrose, in choline deficiency, 70 

 Sulfaguanidine, 369 



vitamin K and, 417 

 Sulfanilamide, 16 



Sulfanilic acid, in niacin estimation, 535 

 Sulfapyridine, pyridine nucleotides and, 



508-509 

 Sulfasuxidine, 380, 386 



in inositol deficiency, 368 



in niacin biosynthesis, 530 



vitamin B12 and, 85 



vitamin K and, 417 

 Sulfate, 51 

 Sulfathalidine, 369 

 Sulfathiazole, 



in vitamin K deficiency, 424 



pyridine nucleotides and, 508-509 

 Sulfite, methylation of, 44 

 Sulfobetaine, see Dimethjdthetin 

 Sulfocholine, 



as methyl donor, 25 



biological activity of, 48 

 Sulfonamide, 655 



acetylation of, 598-599, 607 



in niacin deficiency, 583 



in vitamin K deficiency, 423-424 

 Sunlight, effect on vitamin D require- 

 ment, 253-254 

 Supr aster ol I, 200 



Suprasterol II, properties of, 200-201 

 Suprasterol II4 , 205 

 Swine, 



choline deficiency in, 101-102 



niacin deficiency in, 567-568 



pantothenic acid deficiency in, 664-666 



Tachysterol, 181 



formation of, 178, 208, 209 

 in vitamin D production, 212 

 properties of, 193-194, 202 



Tachysterol 4 , 205 



Taurine, 380 



Teeth, vitamin D and, 247-248, 261 



