Fig. 2. Growth of wild-type, msrA mutant, and complemented mutant strains with and without H₂O₂.

Strains were pre-cultured overnight in FMC media, and diluted with fresh media until a starting OD_{620 nm} = 0.2 was obtained. As indicated, H₂O₂ was added to the cultures to a final concentration of 0.5 mM. Symbols: Δ, wild-type strain; ○, msrA mutant; ◊, complemented mutant; filled symbols represent the same strains cultured with H₂O₂.