[Luminescence quenching of UV-irradiated proteins].

Kinetic curves of paramagnetic centres accumulation and quenching of the luminescence of UV-irradiated proteins at 77 degrees K are compared. Initiation of luminescence of UV-irradiated proteins at the annealing of paramagnetic centres was studied. The luminescence of UV-irradiated proteins was shown to be quenched with the paramagnetic centres formed. It was shown that protein absorption spectrum was not changed when the limiting concentration of paramagnetic centres was obtained in it.