| Forssman antigen | A glycolipid heterophil antigen present on tissue cells of many species. It was first described for sheep red cells and is not present on human, rabbit, rat, porcine or bovine cells. (18 Nov 1997) |
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| Forssman antigen-antibody reaction | The combination of Forssman antibody with heterogenetic antigen of the Forssman type, as in the agglutination of sheep erythrocytes (which contain Forssman antigen) by serum from a person with infectious mononucleosis which contains Forssman antibody. Synonym: Forssman reaction. (05 Mar 2000) |
| fos-related antigen | <molecular biology> A group of phosphoproteins found in the cell nucleus which are structurally similar to the fos oncogene's gene product. (06 Mar 1998) |
| leukocyte common antigen | Family of glycoproteins found on most leukocytes and absent from other cell types. These cell surface antigens can comprise up to 10% of the membrane proteins. (05 Mar 2000) |
| Lyb antigen | Surface antigens of mouse B-cells. (18 Nov 1997) |
| lymphogranuloma venereum antigen | A sterile preparation of inactivated chlamydiae grown in the yolk sac of domestic fowl and used as an antigen in the Frei test. (05 Mar 2000) |
| Lyt antigen | A set of plasmalemmal surface glycoproteins on mouse T lymphocytes. Possession of Lyt 1 partly defines a T helper cell and of Lyt 2, 3 suppressor and cytotoxic cells. Formerly known as Ly antigens. See: Lyb antigen. (18 Nov 1997) |