[Study of preliminary irradiation with wave-lengths 366 and 405 nm on lethal UV-damage to yeast cells]

The protective action of irradiation with wavelengths of 366 and 405 nm on the cells of Saccharomyces cerevisiae, XI race, against lethal lesions caused by short-wavelength UV was studied. Among the total number of the cells with lethal lesions caused by UV, 25--30% of the cells were protected by light with the wavelength of 405 nm, and 50--55% of the cells were protected by light with the wavelength of 366 nm. Lethal UV lesions of the cells are supposed to be of different nature.