Immunology the site on an antigen to which an antibody attaches: its structure determines the antibody for which it is a receptor
Origin of epitopefrom epi- + Classical Greek topos, place: see topic
A small molecular region of an antigen that binds to a particular antibody or antigen receptor on a T cell; an antigenic determinant. A single antigen can have multiple epitopes.
Origin of epitopeepi- Greek topos place, spot