Cluster of Differentiation

**Semantic type:** Immunologic Factor

**Definition:** Cell surface antigens that are differentially expressed on the surface of cells in both a tissue- and differentiation stage-specific manner. Identification of differentiation antigens can be used to characterize, and isolate, the types of cells in a sample and can identify cells that have undergone differentiation or transformation.

**Synonyms:** - CD - CD - CD Antigen - Classification Determinant - Cluster of Designation - Cluster of Differentiation Antigens - Differentiation Antigen