CRYSTALLINE PEPSIN : VI. INACTIVATION BY BETA AND GAMMA RAYS FROM RADIUM AND BY ULTRA-VIOLET LIGHT.
1. The loss in activity of crystalline pepsin solutions when exposed to beta and gamma rays from radium or to ultra-violet light is accompanied by a corresponding decrease in pepsin protein. 2. The rate of inactivation by ultra-violet light depends upon the pH and is a maximum at about pH 2.0.
Northrop
J H
JH
Laboratories of The Rockefeller Institute for Medical Research, Princeton, N. J.