Figure 1. Classic inhibition schemes.

The (A) Competitive (B) Noncompetitive and (C) Mixed-noncompetitive equations and the reaction schemes used to derive them. In the reaction schemes E represents enzyme; S, substrate; I, inhibitor and P, the product. In the equations v, is equal to the velocity of the reaction; V₁, is the maximum velocity usually denoted as V_max; K₁, the substrate binding constant commonly denoted as the K_m (Michaelis–Menten substrate affinity constant); K_i, the inhibitor binding constant.