Question

On what portion of an antigen do the antibodies bind

Answer 1

This region of the antibody is called the Fab (fragment, antigen-binding) region. It is composed of one constant and one variable domain from each heavy and light chain of the antibody. The paratope is shaped at theamino terminal end of the antibody monomer by the variable domains from the heavy and light chains.


https://en.wikipedia.org/wiki/Antibody