[Photoreactivation in Saccharomyces cerevisiae cells after irradiation with electrons (25 MeV). The role of photoreactivated damage in the manifestation of oxygen effects in radio- and UV-sensitive mutants of Saccharomyces cerevisiae].

Significant photoreactivation was noted in radio- and UV-sensitive rad-mutants of Saccharomyces cerevisiae cells exposed to 25 MeV electrons. In order to make the photoreactivable damage be manifest anoxic conditions of irradiation should be chosen as optimal ones. It was shown that the low oxygen effect was partially associated with the photoreactivable damage involved in the lethal effect of ionizing radiation.