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an antigenic determinant located in an unexposed region of a molecule so that it is prevented from interacting with receptors on lymphocytes, or with antibody molecules, and is unable to induce an immune response; it may appear following stereochemical alterations of molecular structure.
The modern definition encompasses all substances that can be recognized by the adaptive immune system. In the strict sense, immunogens are those substances that elicit a response from the immune system, whereas antigens are defined as substances that bind to specific antibodies.Not all antigens produce an immunogenic response, but all immunogens are antigens. Antigens are usually proteins or polysaccharides.ntigens are any proteinaceous substances that enter into our body and elicit an immune response and antibodies are the substances that are produced by the body's immune system to fight against these anigens.... Shanti Â· 7 years ago. Thumbs up. 2. Thumbs down. 1.