Pyruvate is the substrate whose concentration is varied in one plot, NADHNADH in the other. Identify each. Label the following: A - Reciprocal of VmaxVmax for the uninhibited enzyme. B - The line representing obtained in the presence of lactate acting as a competitive inhibitor with respect to the variable substrate. C - The line representing obtained in the presence of lactate acting as a noncompetitive inhibitor with respect to the variable substrate. D - Reciprocal of KMKM in the presence of lactate acting as a competitive inhibitor.