Figure 8.

RnhB, aided by RnhA, protects against killing by hydrogen peroxide in stationary phase. Strains of the indicated genotypes either in logarithmic phase (A) or stationary phase (B and C) were exposed to escalating doses of hydrogen peroxide (indicated on the x-axis) for 2 h as described in Materials and Methods. Survival was quantified by culturing serial 10-fold dilutions of exposed bacteria and normalizing to an unexposed sample from the same culture. When error bars are not visible they are within the plotted symbol.