Comparison of mutagenic efficiency of decay of 32P incorporated in E.Coli WP-2 and E.Coli WP-2S cells

32P-labelled Escherichia coli WP-2 and Escherichia coli WP-2S cells were stored at -1960. The lethal effect induced by 32P decay was equal in both strains. Lethal efficiency of 32P→32S transmutation in DNA amounted to 0.046. Reversion try→try+ were induced with a ten times higher efficiency in UV-sensitive strain WP-2S, as compared with strain WP-2. (author)