FIG 1.

Survival of nongrowing cells incubated under atmospheric oxygen. (A) Filled diamonds, wild type; open squares, ΔtrxA mutant; filled squares, ΔtrxA complemented strain; (B) filled diamonds, wild type; open circles, ΔtrxC mutant; filled circles, ΔtrxC complemented strain. All strains were resuspended in sterile PBS and incubated under atmospheric oxygen for a 12-h period. Samples were taken at 2-h intervals, diluted, and plated onto BA plates. Dilutions were then incubated in a 4% partial-pressure O₂ atmosphere and colony counts determined. The means and standard deviations from results of 4 independent observations are plotted.