INDEX 



689 



Trimethyl-N-methyladenosine, hydroly- 

 sis of, 144 

 2,3,5-Trimethyl-7-D-ribonolactone, 144, 



145 

 Trimethylribose, identification of, 144 

 1,3,7-Trimethyluric acid, uricase and, 



618 

 Trinucleotides, 



electrophoretic mobilities of, 270-271 

 molar absorptivities and, 520 

 paper chromatography of, 257 

 structure of, 429 

 Triose phosphate, deoxyribose biosyn- 

 thesis and, 59 

 Trioses, 



cysteine reaction and, 293 

 cysteine-sulfuric acid reaction and, 295 

 diphenylamine and, 288 

 tryptophan-perchloric acid reaction 

 and, 296 

 Triphosphopyridine nucleotide, 167, 435, 

 596, 597 

 hydrolysis of, 182 

 3'-nucIeotidase and, 593 

 ribose in, 13 

 Triticonucleic acid, 3 

 Trityl chloride, reaction with adenosine, 



145 

 5'-Tritylcytosine, nucleotide synthesis 



and, 174 

 5-Trityl-D-ribose, nucleoside synthesis 



and, 150-151 

 5'-Tritylth3-midine, nucleotide synthesis 



and, 175-176 

 5'-Trityluridine, nucleotide synthesis and 



174 

 Triuret, formation of, 136 

 Tropomyosin, 

 isolation of, 376 

 surface charge of, 381-382 

 Trypsin, turnip virus and, 378 

 Tryptophan, 583 



Tryptophan-perchloric acid reaction, 

 comparative value of, 299-300 

 deoxypentose nucleic acid, 

 mechanism of, 296 

 procedure, 296 

 specificity of, 296 

 deoxyribose and, 53-54 



Tubercle bacilli, nucleoprotein isolation 



from, 314-315 

 Tuberculinic acid, hydrolytic products 



of, 89 

 Tumors, 



8-azaguanine and, 106-107 



deoxyribonuclease inhibitors and, 583 



2,6-diaminopurine and, 105 



6-mercaptopurine and, 105 



nucleic acid in, 285-286 



ribosides and, 33 

 Turnip yellow mosaic virus, 



antisera and, 382 



isolation of, 378-379 



nucleoprotein, composition of, 383 



nucleotides of, 405 



protein of, 382 



ribonuclease and, 382 

 TjTosine, 583 



U 



UDPG, see Uridine diphosphate glucose 

 Ultraviolet, absorption, 265 



apurinic acid and, 343-344 



deoxypentose nucleic acid and, 334- 

 335, 338-339 



nomenclature, 494 



pentose nucleic acid and, 393 



pH and, 495-498 



ribonuclease and, 569-570 

 Ultraviolet light, 



effect on pyrimidines and purines, 123 



paper chromatography and, 246-247 

 Q:,(3-Unsaturated esters, pyrimidine syn- 

 thesis and, 125 

 Uracil, 3, 94, 112, 120, 622 



cationic exchangers and, 218 



color tests for, 123, 305 



dihydoorotic acid dehydrogenase and, 

 621 



dissociation constants of, 455-456, 457 



formation from cytosine, 87 



formic acid and, 259 



ionization of, 268 



internucleotidic linkages and, 412 



isolation and synthesis of, 88-89 



oxidation of, 120, 121, 622-623 



paper chromatography of, 249, 251, 

 253, 254 



reduction of, 119, 120 



