SUBJECT INDEX 



581 



Nucleic acids, T-odd phage and, 229-234 

 Xucleohistones, complexes of, 59 

 Nucleoprotamines, complexes of, 59 

 Xucleoproteins 

 chemical bonds of, 59 

 infrared spectroscopy, 51-52 

 ultraviolet irradiation and, 81 

 Nucleoside diphosphates, hyperchromic- 



ity of, 58 

 Nucleoside phosphor ylase, 490, 494 

 Nucleoside phosphotransferase, 333 

 Nucleotide-peptide compounds, 394 

 Nucleotide pyrophosphorylases, 309- 

 310 



Oligonucleotides 

 enzymic primers and, 128-129 

 hyperchromicity of, 54-55, 57, 101 

 ultraviolet irradiation of, 100-101 



Oligo ribonucleotides, polynucleotide 

 phosphorylase and, 133 



Optical methods 



limiting expressions of P(6), 8-10 

 monodispersed solutions, 6-9 

 polydispersity, influence of, 13 



Ornithine carbamyl transferase, 326 



Orotic acid 



analogs of, 328, 517 



biosynthesis of, 324, 330 



incorporation of, 500, 503-504, 514 



phytolysis and, 76 



pyrimidine precursor and, 324, 327, 



337 

 ultraviolet irradiation and, 100 



Orotidylic acid decarboxylase, 514 



Oxamide, structure of, 69 



Pancreatic deoxyribonuclease, 202 



Parabanic acid, 69, 72 



Paramagnetic resonance, see electron 

 spin resonance 



pH 5 enzyme, 373 



Phosphodiesterase, 56, 126, 272 



Phosphodiester bonds, chemical synthe- 

 sis of, see Internucleotide bonds 



Phosphomonoest erase, 272-273 



Phosphorescence, 42-43 



5-Phosphoribose pyrophosphokinase, 309 



5-Phosphoribosylpyrophosphate amido- 



transferase, 310 

 Phosphoroylsis 



polynucleotides and, 129-130 



ribonucleic acids and, 129-130 



ribo-oligonucleotides and, 130 

 Phosphorus-32 



nucleic acids and, 441-442, 444 



protein synthesis and, 441-442 



radiation effects, 533-535 

 5'-0'-Phosphoryl-thymidylyl- thymidine 



synthesis of, 115-116 

 Photochemical equivalence, law of, 41 

 Photochemical techniques 



conversion factors for, 49-50 



irradiation apparatus for, 47-48 



light intensity measurements, 48-49 



light sources, 46-48 



preparative procedures, 48 

 Photochemistry 



biological inactivation, 81-86 



carbohydrates and, 62-63 



energy transfer 



nucleic acids and, 92-93 

 proteins and, 92 



excited molecular states, 42-44 



free radicals and, 44-46 



nucleic acids and, 79-86 



photoreactivation and, 96-99 



primary process of, 42 



principles of, 40-46 



purine derivatives and, 63-66 



purine nucleotides and, 66-68 



pyrimidines, 68-79 



radiation receptors, living, 90-93 



secondary processes, 46 



triplet state, 43-44 



viruses and, 93-96 

 Photolysis, pyrimidines and, 68-69 

 Photolysis, reversible 



biological studies, 88-90 



concentration effects, 78 



cytosine analogs and, 73-76 



deuterium and, 74-75 



kinetics, 78-79 



nucleic acids and, 87 



oligonucleotides, synthetic and, 87-88 



physicochemical studies, 86-87 



polynucleotides, synthetic and, 87-88 



quantum yields for, 73, 77 



