588 



SUBJECT INDEX 



nucleoprotein, structure of, 247-248 

 ribonucleic acids of, 



base composition of, 248 



content of, 247, 292, 293 

 size of, 247, 292 

 tobacco ringspot virus, 291 

 turnip yellow mosaic virus, 292 

 Viscosity 

 deoxyribonucleic acid and, 18, 32 

 ribonucleic acid and, 18 

 Vitamin Bi 2 , nucleic acid synthesis and, 



341-342 



W 



Watson-Crick double helix, 15, 30, 

 137, 319, 140, 157 

 tobacco mosaic virus and, 271 

 ultraviolet irradiation and, 80 



30, 



X 



Xanthine oxidase 



diaminopurine and, 494 



inhibition of, 491, 496 



6-mercaptopurine and, 480 



thioguanine and, 485 

 Xanthopterin, 461 

 X-ray crystallography, tobacco mosaic 



virus and, 252-255 

 X-ray irradiation, 101-102 



bacteriophage and, 221, 227-228 



tobacco mosaic virus and, 268-269 

 X-ray scattering, 12-13 



Yeast, ultraviolet irradiation and, 80 



Zimm plot, 10-12, 21-22 



