Immunogens

Immunogens

A) are peptides of up to ten amino acids, which are the largest molecules capable of binding directly with TCRs or antibodies.
B) are capable of being bound by antibodies directly without the mediation of major histocompatibility (MHC) proteins.
C) are recognised by TCRs only when presented complexed with the MHC molecules of phagocytes. The MHC molecules are only capable of presenting epitopes that were on the surface of the intact molecule.
D) to which T cells respond are of a wide variety and include carbohydrates and proteins. B cells only respond to protein immunogens.
E) are antibodies produced in response to a foreign organism.