FIG. 2.

Roles of ahpC and katA in aerobic growth. (A) Final growth yield (24 h) of strains SH1000 (wild type), KC041 (ahpC), KS100 (katA), and KC043 (ahpC katA) grown in CLR (black bars), CLR supplemented with 1 mg ml⁻¹ catalase (white bars), and under low-aeration conditions (100 ml CLR in a 125-ml conical flask; 41 h) (gray bars). A boiled-catalase control was carried out only for SH1000 and KC043 (ahpC katA) (hatched bars). The error bars indicate standard errors of the means. (B) Optical density (open symbols) and viability (closed symbols) of SH1000 (squares) and KC043 (ahpC katA) (circles) grown in CLR.