674 



INDEX 



Isopropanol, paper chromatography and, 

 253-254, 255, 257 



2',3'-Isopropylidene adenosine, nucleo- 

 tide synthesis and, 173-174 



2',3'-Isopropylidene-3 , 5'-cycloadenosine 

 iodide, crystal structure of, 462 



2,3-Isopropylidene-D-glyceraldehyde, de- 

 oxyribose synthesis from, 52-53 



2',3'-Isopropylidene inosine, nucleotide 

 synthesis and, 173 



Isosbestic points, identification of com- 

 pounds and, 116 



a-Ketoacids, cysteine reaction and, 293 

 a-Ketoglutaric acid, amination, purines 



and, 600 

 Ketohexoses, 



orcinol reaction and, 301-302 

 tryptophane-perchloric acid reaction 

 and, 296 



Lactic acid, gl3'ceraldehyde-3-phosphate 



and, 438 

 Laevulic acid, see Levulinic acid 

 Lanthanum, 



deoxypentose nucleic acid and, 337 



nucleic acid hydrolysis and, 198 



nucleic acid purification and, 333 



nucleoprotein and, 317 

 Lauryl amine, paper chromatography 



and, 257 

 Lecithins, 1 



hydrolysis of, 415 

 Leucine, 614 

 Levulinic acid, 48, 49, 54 



diphenylamine and, 288 



formation of, 59, 141 



indole-hydrochloric acid reaction and, 

 298 



thymine estimation and, 304-305 

 Lithium arsenotungstate, color tests 



and, 123 

 Lithium chloride, pentose nucleic acid 



isolation and, 389 

 Liver, pentose nucleic acid of, 397-398 

 L-Lysine, 574, 575 



nucleotide derivatives and, 99 



Lysozyme, deoxypentose nucleic acid 



denaturation and, 529, 531 

 Lyxose, 12, 141 



M 



Magnesium, 



adenosine kinase and, 594 



deoxypentose nucleic acid and, 526-527 



desoxyribonuclease and, 578, 581, 582, 

 584, 585 



5'-nucleotidase and, 592 



phosphodiesterase and, 588 



ribonuclease and, 572 

 Malic acid, pj^rimidine synthesis and, 125 

 Malonic acid, 



formation from uracil, 623 



pyrimidine synthesis and, 125, 129 

 Malononitriles, 



purine synthesis and, 133, 135 



pyrimidine synthesis and, 125, 130 

 Manganese, 



adenosine kinase and, 594 



deoxyribonuclease and, 581 



5'-nucleotidase and, 592 



phosphodiesterase and, 588 

 9-D-Mannopyranosyladenine, 



reactions of, 148 



synthesis of, 152-153 

 Mannose, 



cysteine-sulfuric acid reaction and, 303 



nucleotides and, 60 

 2-Mercaptoadenine, 



adenine synthesis and, 131 



synthesis of, 132, 133 

 2-Mercapto-5-chloropyrimidine, synthe- 

 sis of, 128 

 2-Mercaptoethylamine, 184 

 2-Mercaptohypoxanthine, 



conversion to hypoxanthine, 131 



synthesis of, 132 

 6-Mercaptopurine, 



biological activity of, 105-106 



reaction with amines, 130 



synthesis of, 130 



tumors and, 135 

 Mercaptopurines, reactions of, 130-131 

 Mercaptopyrimidines, 



purine sj'nthesis and, 132 



reactions of, 127-128 



synthesis of, 127, 128 



