[Changes in the mitochondrial ATPase activity of liver cells after X-ray irradiation].

24 h following total-body X-irradiation of rats with a dose of 7 Gy the growth of the ATPase activity diminished, with the addition of bicarbonate, by 2 times in the preparations of mitochondria and submitochondrial particles, and by 1.5 times, in preparations of a soluble enzyme. No changes were noted in the electrophoretic motility of soluble ATPase.