Describe the structure of antigens. What is an antigenic determinant?
Although antigens are large molecules, only certain regions of antigens, usually sections of the antigen 10 amino acids long, serve in stimulating lymphocytes to produce antibodies. These regions, called antigenic determinants, interact with receptor sites on the lymphocytes. Antigens may have one or more antigenic determinant regions and, thus, may stimulate one or more antibodies to be produced.
