[Structural changes in the plasma membranes during thymocyte irradiation].

Thymocytes were irradiated with doses of 4 to 10(3) Gy. The binding of 1-anilino-naphthalene-8-sulphonate and Ca2+ to plasma membranes; viscosity and lipid peroxidation; Stern-Folmer constant; and the number of SH-groups of membrane proteins were determined. The structural changes in plasma membranes after irradiation of thymocytes were found to be cooperative.