Antigen
Antigen
A molecular structure that can be specifically recognized by immune receptors or antibodies.
Overview
EXPLORE BY LEVELAn A molecular feature that an antibody or immune-cell receptor can recognize. Recognition does not always cause a harmful or protective response. is a molecular feature that an A protein made by B-cell descendants that binds a particular molecular target. Binding does not by itself prove that the antibody neutralizes it. or immune-cell A protein that detects a signal, such as a hormone, and helps a cell respond. can recognize. Not every recognized feature causes a harmful immune response.
Quick Facts
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Recommended Reading
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Research Claims
Antigenicity, immunogenicity, epitope accessibility, affinity, and tolerance are separate properties. A detected antigen may be self, environmental, microbial, or tumor-derived.