Antigen (source code)
= Antigen
{wiki}
In <antibody> binding, an <antigen> is material bearing a recognized <epitope>. An <antigen> need not be a <protein>; <polysaccharides> can also carry <epitopes>. One <antigen> may present several different <epitopes>, so recognizing one feature does not imply recognizing every part of the target. <Immunobiology: The Immune System in Health and Disease, 5th edition by Charles A. Janeway, Jr. and others/The interaction of the antibody molecule with specific antigen>[Immunobiology, 5th edition, §3-8: small recognized regions of protein and polysaccharide antigens]{ref}
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