Inductive-resonance energy transfer between chromophores localized within different part of irradiated and nonirradiated erythrocyte ghosts

A study was made of the inductive-resonance energy transfer between chromophore pairs, tryptophan-pyren, tryptophan-1.8-anilinonaphthalene sulfonate (ANS), puren-1.8-ANS, diphenylhexatrien-ethidium, and 1.8-ANS-ethidium, in irradiated (250 Gy) and nonirradiated preparations of erythrocytic membranes. The Cadiation-induced decrease in the energy transfer was noted in the pairs in which one of the chromophores wasl localized in a lipid pas phase. On the basis of the data obtained it is suggested that irradiation of membranes causes the lesions in them which lead to a reduction of the efactive thickness of a hydrophobic part of the lipid bilayer