Antigen - Wikipedia
At the molecular level, an antigen can be characterized by its ability to bind to an antibody's paratopes. Different antibodies have the potential to discriminate among specific epitopes …
Antigen: What It Is, Function, Types, & Testing
An antigen is anything recognized by your immune system. Antigen tests diagnose viral infections, monitor certain illnesses or look for stem cell compatibility.
Antigen | Definition, Function, Types, & Facts | Britannica
Nov 12, 2025 · 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, …
Antigens: Types, How They Work, Testing, and More
Sep 5, 2025 · 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.
What Are Antigens and Antibodies? - sciencenewstoday.org
Aug 5, 2025 · The term “antigen” is short for antibody generator, which offers the first clue about its purpose. Antigens are molecular structures, often proteins or polysaccharides, that are …
Antigen Definition, Function, and Types - Science Notes and ...
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.
Antigens and the initiation of an immune response - Student ...
Antigen A small substance that causes the body to initiate an immune response. Antigens are bound by specific antibodies or cell receptors and can also be presented by cells via MHC …