An inhibitory T CELL receptor that is closely related to CD28 ANTIGEN. It has specificity for CD80 ANTIGEN and CD86 ANTIGEN and acts as a negative regulator of peripheral T cell function. CTLA-4 antigen is believed to play role in inducing PERIPHERAL TOLERANCE.

Synonyms: CD152 Antigens, Cytotoxic T Lymphocyte Antigen 4, CTLA-4 Protein, CD152 Antigen, Cytotoxic T-Lymphocyte-Associated Antigen 4, 0, CTLA-4 Antigen, Antigens, CD152, Cytotoxic T Lymphocyte Associated Antigen 4, Cytotoxic T-Lymphocyte Antigen 4, Antigen, CD152, CTLA 4 Antigen, Antigen, CTLA-4, CTLA 4 Protein