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- Dictionaryantigen/ˈantɪdʒ(ə)n/
noun
- 1. a toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.
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Jun 1, 2024 · Antigen, substance that is capable of stimulating an immune response, specifically activating lymphocytes, which are the body’s infection-fighting white blood cells. In general, two main divisions of antigens are recognized: foreign antigens (or heteroantigens) and autoantigens (or self-antigens).
Antigens are recognized by antigen receptors, including antibodies and T-cell receptors. Diverse antigen receptors are made by cells of the immune system so that each cell has a specificity for a single antigen.
Aug 16, 2022 · An antigen is a marker that tells your immune system whether something in your body is harmful or not. Antigens are found on viruses, bacteria, tumors and normal cells of your body. Antigen testing is done to diagnose viral infections, monitor and screen for certain conditions and determine whether a donor is a good match for a transplant.
The meaning of ANTIGEN is any substance (such as an immunogen or a hapten) foreign to the body that evokes an immune response either alone or after forming a complex with a larger molecule (such as a protein) and that is capable of binding with a product (such as an antibody or T cell) of the immune response.
ANTIGEN definition: 1. a substance that causes the body's immune system (= the system for fighting infections) to…. Learn more.
Jan 16, 2024 · An antigen is a molecule that may be recognized by the immune system and trigger an immune response by activating leukocytes (white blood cells) that fight disease. Antigens may be present on invaders, such as bacteria, viruses, parasites, fungi, and transplanted organs, or on abnormal cells, such as cancer cells.
Oct 25, 2023 · An antigen is a molecule or particle, often found on the surface of cells, viruses, or bacteria, that triggers an immune response because the body recognizes it as foreign or non-self. The term “antigen” is a shortened term for ANTI body GEN erating substance.
