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Lineweaver-Burk plots: kinetics of reduction of nitrate, tellurite, and selenate by purified Nap when methyl viologen is the electron donor. Vmax is expressed in micromoles of substrate reduced per minute per milligram of enzyme. The correlation coefficients for the nitrate, tellurite, and selenate plots are 0.92, 0.88, and 0.88, respectively.
