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Plot of the residual enzymatic activity after exposure to increasing concentrations of chlorite, in the presence (triangles) and absence (circles) of excess/600 μM guaiacol. The turnover number, i.e., the maximal number of chlorite molecules dismutated per heme, is obtained by extrapolating a line fitted through each series of points to the x-axis. Turover numbers are ~1.7 × 104 in the absence of guaiacol and ~1.3 × 10 (5) in its presence.
