The cluster of differentiation (CD) is a protocol used for the identification and investigation of cell surface molecules present on White blood cells.
CD molecules can act in numerous ways, often acting as receptors or ligands (the molecule that activates a receptor) important to the cell. A signal cascade is usually initiated, altering the behavior of the cell. Some CD proteins do not play a role in cell signaling, but have other functions, such as cell adhesion.
CD for humans is numbered up to 350 most recently.
CD79a + CD5
Tumor antigen is a substance produced in tumor cells that triggers an immune response in the host.
Tumor antigens are useful in identifying tumor cells and are potential candidates for use in cancer therapy.
Initially they were broadly classified into two categories based on their pattern of expression: Tumor-Specific Antigens, which are present only on tumor cells and not on any other cell and Tumor-Associated Antigens, which are present on some tumor cells and also some normal cells.
Blood Group Tn Antigen,
CD66a + CD66c + CD66d + CD66e,
Carcino Embryonic Antigen,
M2A Oncofetal Antigen,
MOK protein kinase,
Melanoma Associated Antigen,
Ovarian Carcinoma-associated Antigen,
Prostate Specific Antigen,