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Effect of H2O2 on growth of EcKatG-induced cells compared to uninduced cells of Methanosarcina acetivorans strain DJL20. Mid-exponential-phase cultures of DJL20 grown in the (a) absence or (b) presence of tetracycline were challenged with 0 (diamonds), 1.5 (squares) or 3 mM (triangles) H2O2 at the time point indicated by the arrow. The data plotted are the mean±sd from three independent experiments.
