FIG. 7.

MMS sensitivity assay results. Exponentially growing cultures of S. pneumoniae R6 wild-type (solid line) and radA mutant (dotted line) strains were incubated at 37°C with 0.1% MMS, and survival of the cells was determined at the indicated time points. Survival rates are given as percentages relative to the number of cells present before the addition of MMS. Data were derived from three independent experiments and are presented as means ± standard deviations.