Become a Certified Fairyologist! In Doreen Virtue's exciting and entertaining new video course, you'll learn all about the fairies, including their history, lineage, myths, multi-cultural aspects, other elementals, and how to connect with and receive messages from fairies, including how to see and photograph fairies.
Endogenous vs Exogenous Antigens. Any molecule or substance that reacts to a product of a specific immune response and stimulates antibody generation is considered as an antigen.The antibody generation by an antigen is called antigenicity of that particular molecule.Antigens can be either a protein or a polysaccharide.he vast majority of antigens are exogenous antigens. They are introduced into the body from outside via various infections agents such as bacteria, viruses, fungi, protozoa, helminthes etc., or environmental substances such as dust mites, foodstuff, pollen etc. by inhalation, ingestion, or injection.
1. An antigen is defined as a substance that reacts with antibody molecules and antigen receptors on lymphocytes. 2. An immunogen is an antigen that is recognized by the body as non-self and stimulates an adaptive immune response.3. Chemically, antigens are large molecular weight proteins and polysaccharides.4.n antigen is defined as a substance that reacts with antibody molecules and antigen receptors on lymphocytes. 2. An immunogen is an antigen that is recognized by the body as non-self and stimulates an adaptive immune response.