FIG 3 .
Growth of S. aureus and B. subtilis wild-type strains and ΔmurQ mutants in rich medium with or without MurNAc. S. aureus (Sa) and B. subtilis (Bs) wild-type strains (WT, solid symbols) and the respective mutants (ΔmurQ, open symbols) were grown in LB medium in the absence (circles) or presence (triangles) of 0.2% MurNAc. Bacterial growth was monitored by measuring optical density at 600 nm and is presented as the mean values ± standard errors of the means (SEM) in log10 scale.