ANTIGENS
Antigens are any substances that are capable, under appropriate conditions, of inducing the formation of antibodies and reacting specifically with the antibodies so produced. They react with both T-cell recognition receptors and with antibodies. These antigenic molecules may have several antigenic determinants, called epitopes, and ech epitope can bind with a specific antibody. Thus, a single antigen can bind to many different antibodies with different binding sites.
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