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Peroxidase kinetics of trans-dominant KatG mutants. The absorbance at 405 nm versus time for the reduction of ABTS substrate is plotted. Vector only and katG-expressing plasmids were transformed to M. bovis BCG strain ATCC 35735; katG-deficient M. bovis BCG strain ATCC 35747 (shown as ΔkatG) was transformed with vector only in this study. Abbreviations: WT, WT katG; VC, vector control (no katG on plasmid).
