FIG. 3.

Mutations in gshB and gshA have opposite effects on sensitivity of the strain to paraquat. Cultures were grown as described in Materials and Methods. (A) Cultures were grown in Luria broth supplemented with 4 μM paraquat (methyl viologen). (B) Strains were grown in Luria broth supplemented with 0.4 μM paraquat. In each case, the strains were LT2 (wild type, □), DM4496 (gshB mutant, ▴), and DM4620 (gshA mutant, ●).