The C Domain of Antigen-Binding Proteins Functions To

Question

The C domain of antigen-binding proteins functions to
A) attach the antigen-binding domain to the cytoplasmic membrane.
B) bind to the cytoplasmic membrane of foreign cells.
C) complex multiple antigen-binding proteins together.
D) bind to epitopes.

Accepted Answer

The C domain, or constant region, of antigen-binding proteins like antibodies, functions to attach the antigen-binding domain to the cytoplasmic membrane, particularly in membrane-bound forms like B cell receptors.