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Effect of hydrogen peroxide on pyrene metabolism by Mycobacterium sp. strain PYR-1. Each point is the average of duplicate determinations. (A) ●, control pyrene incubation (32 nmol); ○, pyrene plus 0.05 mM H2O2; ▾, pyrene plus 0.1 mM H2O2; , pyrene plus 0.2 mM H2O2; ■, heat-inactivated cells plus pyrene. (B) ●, control pyrene inculation (34 nmol); ○, pyrene plus 1 mM H2O2; ▾, pyrene plus 2 mM H2O2.
