FIG 5.

UV₂₂₂ killing of log- and stationary-phase cells of various species and strains. Log-phase and stationary-phase cells of various species and strains were isolated and UV₂₂₂ treated, and cell survival was measured, all as described in Materials and Methods. Symbols: ○, log-phase cells of B. subtilis PS533 (wild type); ●, stationary-phase cells of B. subtilis PS533; □, log-phase cells of B. subtilis PS2318 (recA); △, log-phase cells of S. aureus; ▲, stationary-phase cells of S. aureus. Data shown are averages from duplicate determinations ± standard deviations in one experiment. This experiment was repeated twice, and the same relative rates of killing of cells of different species were seen.