FIG. 3.

The effect of mazEF on bacterial viability after exposure to oxidative stress. E. coli strains MC4100relA⁺ (a) and K38 (b) and their ΔmazEF derivatives were incubated in the presence of various concentrations of H₂O₂ at 37°C for 10 min. Cell viability and survivor ratios were determined as described in the legend to Fig. 1. The results represent one experiment out of three independent similar experiments. ▪, wild-type strains; ▴, ΔmazEF derivatives of the wild-type strains.