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 …

Aug 16, 2022 · An antigen is anything recognized by your immune system. Antigen tests diagnose viral infections, monitor certain illnesses or look for stem cell compatibility.

Dec 20, 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, …

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.

Antigens play a role in the immune system, acting as molecular markers that trigger an immune response. These substances help distinguish between self and non-self entities within the …

Jul 8, 2023 · An antigen is any substance that causes your immune system to produce antibodies against it. This means your immune system does not recognize the substance, and is trying to …

Mar 6, 2025 · What is an antigen in simple terms? An antigen is a foreign substance, such as bacteria, viruses, or pollen, that triggers an immune response in the body, especially the …

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 are how the body identifies foreign substances. Antigens exist on viruses, bacteria, allergens, parasites, proteins, cancer cells, and normal cells in your own body. When the …

May 24, 2023 · A simple definition is that an antigen refers to any substance that triggers an immune response. This response is intended to naturally protect the body from harmful …