[The effect of D2O in irradiation of Ca2+-ATPase]

Ca(2+)-ATPase from the meat cattle thymocytes plasma membranes in solutions 70% D2O, pH 4.0, 7.0 and 10.0 was irradiated with the doses of 10-10(4)Gr. It was shown that D2O produced stabilizing action on protein macromolecules. The activity of Ca(2+)-ATPase was changed under the influence of ionizing radiation in the presence of D2O.