CTLA4, Cytotoxic T-lymphocyte protein 4, Cytotoxic T-lymphocyte-associated antigen 4, CD152
Cytotoxic T lymphocyte antigen 4 (CTLA-4) is a pivotal immune checkpoint receptor that belongs to the immunoglobulin superfamily and is homologous to the T cell co-stimulatory protein CD28. Upon T cell activation, T cells express CTLA-4 that functions as