Antigen vs. Immunogen

Antigennoun

(immunology) A substance that induces an immune response, usually foreign.

Antigennoun

any substance (as a toxin or enzyme) that stimulates the production of antibodies

Antigennoun

a toxin or other foreign substance which induces an immune response in the body, especially the production of antibodies.

Antigen

In immunology, an antigen (Ag) is a molecule or molecular structure, such as may be present on the outside of a pathogen, that can be bound by an antigen-specific antibody or B-cell antigen receptor. The presence of antigens in the body normally triggers an immune response.

Immunogennoun

(immunology) Any substance that elicits a immune response; an antigen

Immunogennoun

any substance that produces immunity when introduced into the body.

Immunogennoun

any substance or organism that provokes an immune response (produces immunity) when introduced into the body

Immunogen

An immunogen is an antigen or any substance that may be specifically bound by components of the immune system (antibody, lymphocytes). The term antigen arises from its ability to induce generation of antibodies.