The effect of roentgen irradiation on the uptake of radioactive phosphorus into the acid-soluble compounds of transplanted mouse mammary carcinoma.

radiations might affect nucleic acid metabolism was that by Mitchell (10), who observed that,cells of hunian malignant tumors showed an increase in. the absorption of ultraviolet light after exposure to xand 7-rays. Evidence that irradiation inter feres with the synthesis of deoxyribonucleic acid (DNA)' has been demonstrated repeatedly by methods with radioactive tracers. A review of the literature on this subject has been published (@. Huribert and co-workers (7) have described