FIG 6.

Comparisons between CC101 ΔmutT ΔribA and CC101 ΔmutT ΔribA Δndk strains. Panels A and B represent two independent comparisons of Lac⁺ reversion frequencies. Reversion frequencies were obtained by dividing the number of Lac⁺ revertants by the respective viable counts. (C) Lac⁺ reversion rates were estimated as described in Materials and Methods. Each comparative plot represents median and ≥95% confidence intervals estimated using 10 or 11 replicates of each strain (refer to Tables S5 and S6).