Immunogens

Definition

Immunogens are substances that provoke an immune response by stimulating the production of antibodies or sensitizing T cells. They are typically foreign molecules like proteins, polysaccharides, or nucleic acids.

5 Must Know Facts For Your Next Test

1. Immunogens must be recognized as foreign by the immune system to trigger a response.
2. The effectiveness of an immunogen is influenced by its molecular size, complexity, and foreignness.
3. Haptens are small molecules that become immunogenic only when attached to larger carrier molecules.
4. Adjuvants can enhance the immunogenicity of substances, making them more effective at provoking an immune response.
5. Not all antigens are immunogens, but all immunogens are antigens.

Related terms

Antigen:

A substance that can be specifically bound by antibodies or T cell receptors.

Epitope:

The specific part of an antigen molecule to which an antibody attaches itself.

Adjuvant: A substance added to vaccines to enhance the body's immune response to the provided antigen.