Survival of Saccharomyces cerevisiae after treatment with the restriction endonuclease Alu I.

Treatment of yeast cells proficient in the repair of radiation damage (Saccharomyces cerevisiae) with the restriction endonuclease Alu I leads to a positive dose-effect relationship between inactivation level and enzyme concentration. The data suggest an uptake of the active restriction enzyme into the cells and a relationship between induction of DNA double-strand breaks and cell killing.