FIG 4.

Increased sensitivity of the ΔmntR and Δzur mutants to lysozyme and antibiotics. (A) Growth curves of the wild-type (black symbols), ΔmntR (triangles), and Δzur (gray symbols) strains grown in LB medium. A representative assay is represented. (B) Growth curves of the wild-type (circles), ΔmntR (triangles), and Δzur (squares) strains grown in LB medium in the presence of 1 mg · ml⁻¹ lysozyme. A representative assay is represented. (C) Results of disk diffusion assays with the indicated antibiotics. Bars indicate the percent increase in zone of inhibition for the ΔmntR (white bars) and Δzur (gray bars) mutants relative to the wild type. All the experiments were performed at least in three biological replicates.