FIG 3.

UV₂₂₂ killing of spores of strains of B. subtilis with defects in possible protective components. Spores of isogenic B. subtilis strains were treated with UV₂₂₂, and spore survival was measured as described in Materials and Methods. Symbols: ○, PS533 (wild type); ●, PS3328 (cotE); △, PS578 (α⁻ β⁻); ▲, PS2318 (recA); ■, PS4150 (cotE gerE); □, FB122 (spoVF sleB), prepared with DPA. Data shown are averages from duplicate determinations ± standard deviations in one experiment. This experiment was repeated twice, with the same relative rates of killing of spores of different species seen.