The antibody protein has two functional domains, one for antigen binding and a second to confer specific effector functions. These two functional domains are encoded by the antibody light chain and antibody heavy chain polypeptides, respectively.

Question

Quizplus · Accepted Answer

The antibody molecule is composed of two heavy chains and two light chains that together form both the antigen-binding sites and the effector function domains. The antigen-binding site is formed by the variable regions of both the heavy and light chains, while the constant region of the heavy chain is primarily responsible for mediating effector functions.

The Antibody Protein Has Two Functional Domains, One for Antigen