Antigen definition

Antigen means a substance recognized by the body as being foreign; it results in the production of specific antibodies directed against it.
Antigen means a substance that causes the immune system to produce antibodies against it.
Antigen means (a) any protein (including any glyco- or lipo-protein), carbohydrate, compound or other composition that stimulates the production of Antibodies or against which Antibodies are Directed, or (b) any naturally occurring isoform or variants thereof. The whole protein, carbohydrate, compound or other composition as well as a portion of the whole is considered the same Antigen.

Examples of Antigen in a sentence

  • However, Human Leukocyte Antigen testing is covered as indicated in the Summary of Medical Benefits.

  • However, Human Leukocyte Antigen testing is covered as indicated in the Summary of Medical Benefits, subject to certain conditions.

  • Human Leukocyte Antigen testing is covered as indicated in the Summary of Medical Benefits.

  • Antigen excess will occur if there is not a slight antibody excess or antigen/antibody equivalency at the site of precipitation.

  • Antigen excess in IFE is usually due to a very high level of immunoglobulin in the patient sample.


More Definitions of Antigen

Antigen means any protein (including any glyco- or lipo-protein), carbohydrate, compound or other composition, and any fragment, peptide or epitope thereof, that stimulates the production of antibodies.
Antigen means a molecule (i.e., protein, polypeptide, peptide, carbohydrate, glycoprotein, glycolipid and/or any combination of the foregoing that is, or is derived in whole or part from, a molecule associated with an infectious agent) that produces an Immune Response to such molecule in a human and/or animal recipient.
Antigen means any antigen, defined by its amino acid sequence, associated with a Pathogen, together with all Antigen Variants thereof.
Antigen means an HBV Antigen or an HIV Antigen, as the context requires.
Antigen means a molecule that causes an immune system response.
Antigen means the target molecule: .
Antigen means any protein or other molecular structure including for the avoidance of doubt a cell surface sugar or part thereof (including any polypeptide or fragment thereof) whether glycosylated or otherwise and is capable of or demonstrates any binding affinity with any antibody, antigen-binding domain or other engager protein or any fragment of any of the foregoing;