n. pl. locÂ·ules or locÂ·uÂ·li (-lÄ«â²). A small cavity or compartment within an organ or part of an animal or plant, as any of the cavities within a plant ovary. [Latin.
Competitive inhibition is a form of enzyme inhibition where binding of the inhibitor to the active site on the enzyme prevents binding of the substrate and vice versa. Most competitive inhibitors function by binding reversibly to the active site of the enzyme.
As such, there can be different types of antagonists. These include: 1  competitive antagonist, which are drugs that bind to the same site as the natural ligand, agonists, or partial agonist, and inhibit the effect of the natural ligand or agonist. 2  They would be analogous to competitive inhibitors of enzyme.