The inhibitor may function by combining with the enzyme at the site at which the reaction usually occurs (competitive inhibition) or at another site (noncompetitive inhibition).

• 抑制剂可以在底物常常结合的位点上与结合而起作用(竞争性抑制剂)。或者在另一些位点上起作用(非竞争性抑制剂)。