FIG. 1.

Resistance of wild-type, exoA nfo, α⁻β⁻, and α⁻β⁻ exoA nfo spores to H₂O₂ (A) and tBHP (B). Spores of various strains were incubated with H₂O₂ or tBHP, and viability was determined as described in Materials and Methods. ▪, PS832 (wild type); •, PERM454 (exoA nfo); □, PS356 (α⁻β⁻); ○, PERM450 (α⁻β⁻ exoA nfo).