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. Did you know?

2025年1月7日 · 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). Foreign antigens originate from outside the body.

In immunology, an antigen (Ag) is a molecule, moiety, foreign particulate matter, or an allergen, such as pollen, that can bind to a specific antibody or T-cell receptor. [1] . The presence of antigens in the body may trigger an immune response. [2]

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. What is an antigen?

2024年1月16日 · Recognizing antigens is crucial in the function of the immune system. 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.

2023年10月25日 · Antigens are large, complex molecules that are often proteins or polysaccharides. They possess specific regions known as epitopes, which are the sites recognized and bound by antibodies. Each antigen has multiple epitopes, so several different antibodies recognize it. An antibody or T-cell receptor has two binding sites per molecule.

2022年8月10日 · Antigen is a substances usually protein in nature and sometimes polysaccharide, that generates a specific immune response and induces the formation of a specific antibody or specially sensitized T cells or both. Although all antigens are recognized by specific lymphocytes or by antibodies, only some antigens are capable of activating lymphocytes.

2024年4月9日 · In the field of immunology, an antigen refers to a molecule, moiety, foreign particulate matter, or an allergen that can bind to a specific antibody or T-cell receptor. Antigens can be found on normal cells, cancer cells, parasites, viruses, fungi, and bacteria.

ANTIGENIC meaning: 1. relating to or consisting of antigens (= substances that cause the body's immune system to…. Learn more.

Antigenic substances are recognized by the immune system and elicit a response aimed at neutralizing or eliminating them. The antigenic determinant, also known as an epitope, is the specific part of an antigen that is recognized by antibodies or T-cell receptors.