(biochemistry) In the testing of cell surface antigens, an antigen that has a more refined or specific cell surface reaction relative to a broad antigen.(Example: HLA-B51 and HLA-B52 are split antigens of HLA-B5)

(biochemistry) In the testing of cell surface antigens, a serological specificity that is poor or broad relative to other specificities and can be defined as 2 or more split antigens.(Example: HLA-B51 and HLA-B52 are split antigens of the HLA-B5 broad antigen)

(immunology) The mechanism by which an infectious organism changes its surface proteins in favor of circumventing a host immune response.

An antigen located on the surface of red blood cells, encoding a glycosylated membrane protein that is a non-specific receptor for several chemokines.

plural of antigenic variation

The process by which different strains of a virus or viruses combine to form a new subtype having a mixture of the surface antigens of the original strains.

(medicine) Surface antigen of the hepatitis B virus (HBsAg).

Synonym of autoantigen

The genetic material that codes for the structural protein of a retrovirus

(medicine) A glycoprotein enzyme secreted by the epithelial cells of the prostate gland and becoming part of the ejaculate; used in the diagnosis of prostate cancer.