SUBJECT INDEX 



575 



incorporation of, 300, 349 



nucleoside hydrolase and, 317 



orotic acid and, 307 



protein synthesis and, 492 



synthesis of, 407 



thiouracil and, 477 



transglycosidase and, 320 



urea and, 295 



utilization of, 391 

 Uracil-4-carboxylic acid, see Orotic acid 

 Uracil deoxyriboside, 



significance of, 320 



thymidine and, 324 

 Uracil-thymine oxidase, products of, 428 

 Urea, 



allantoin and, 278, 279 



catabolism of, 426 



orotic acid degradation and, 303 



purine catabolism and, 425 



pyrimidines and, 295, 427, 428, 434 



uracil degradation and, 298 



uric acid and, 426-427 

 Urease, 



distribution of, 425, 426 



uracil catabolism and, 428 

 Ureidosuccinase, products formed, 307 

 Ureidosuccinic acid, 



formation of, 306-307 



orotic acid and, 302, 303-305 



pyrimidine synthesis and, 298 

 Urethan, formate incorporation and, 378 

 Uric acid, 



biosynthesis of, 277-283, 423 



catabolism of, 349, 423-425 



degradation of, 279, 282 



excretion, 



Dalmatian hound, 423 

 birds and reptiles, 426 

 humans, 426 



incorporation of, 347 



inosinic acid and, 292-293 



metabolism, in human, 426-427 



transglycosidase and, 320 

 Uric acid riboside, nucleoside hydrolase 



and, 314 

 Uricase, 



distribution of, 423, 426 



microsomes and, 236, 237 



mitochondria and, 221, 227, 243 



nuclei and, 133, 139 

 Uridine, 



adenosine phosphokinase and, 329 



amination of, 316 



hydrolysis of, 314 



incorporation of, 326, 350 



nucleoside hydrolase and, 317, 318, 337 



orotic acid and, 300, 306 



riboside phosphorylase and, 316 

 Uridine diphosphate, 391-392 



orotic acid and, 324 

 Uridine diphosphate glucose, nucleoside 



triphosphates and, 337 

 Uridine-3'-phosphate, nucleotidase and, 



328 

 Uridine-5'-phosphate, 391-392 



nucleotidase and, 328 



orotic acid and, 307, 324, 382, 389, 431 

 Uridine pyrophosphates, penicillin and, 



417-418 

 Uridine-5'-triphosphate, isolation of, 



336, 391 

 Uridylic acid, 



incorporation of, 326, 350 



nucleoside hydrolase and, 317 



penicillin and, 417, 418 

 Usnic acid, 



nucleic acid and, 481, 491 



protein synthesis and, 511 



Victoria blue, nucleic acid polymeriza- 

 tion and, 53 

 Viruses, 



azaguanine and, 514 



evocation and, 484, 485 



fate of, 421-422 



glucose oxidation and, 260-261 



infectivity of, 514 



nucleic acids in, 43, 468 

 origin, 419-421 

 synthesis, 387 



pentose synthesis and, 261 



plant, composition of, 476 



protein of, 514 

 Vitamin Be , mitochondria and, 222 

 Vitamin B12 , 



deoxypentose nucleic acid and, 25-27, 

 39 



glycine incorporation and, 377 



mitochondria and, 222 



nuclei and, 141 



