Treatments affecting the ultraviolet absorption spectrum of ribonucleic acid from three sources

The intensity of absorption in the 260 mμ region by three different types of ribonucleic acid and by the fraction of YNA that resists attack by pancreatic ribonuclease, is increased during several types of hydrolysis to an extent that parallels the extent of hydrolysis.

Exposure to strong urea solutions has a small and irregular effect on the absorption by nucleic acid but diminishes the absorption by TMV.