Cd152,CD152 antigen,Ctla,Ctla-4,cytotoxic T-lymphocyte protein 4,cytotoxic T-lymphocyte-associated antigen 4,Ly-5,Ly-56.
Inhibitory receptor acting as a major negative regulator of T-cell responses. The affinity of CTLA4 for its natural B7 family ligands, CD80 and CD86, is considerably stronger than the affinity of their cognate stimulatory coreceptor CD28.