NCIt definition : T-cell surface antigen CD2 (351 aa, 39 kDa) is encoded by the human CD2 gene. This
protein plays a role in both T-cell activation and T-cell adhesion to other cells.;
NCIt note : An antigen that functions as a co-receptor or accessory molecule in the T-cell receptor
complex, which is involved in helper and cytotoxic T-lymphocyte adhesion and activation.
The molecule is expressed on the cell surface of the majority of peripheral T-lymphocytes,
NK cells, and thymocytes.;