Antigens interact with antibodies at
A) the outer end of each arm of the Y.
B) the junction of heavy and light chains.
C) different regions depending on the class of antibody.
D) the bottom stem of the heavy chain of the Y.
E) the disulfide bridges of the antibody molecule.

Question

Quizplus · Accepted Answer

The outer end of each arm of the Y-shaped antibody molecule contains the antigen-binding site, where the antigen interacts with the antibody. This region consists of the variable regions of both the heavy and light chains.

Antigens Interact with Antibodies at