CTLA-4 CTLA4 cytotoxic T-lymphocyte-associated protein 4 CTLA4 CTLA-4 CTLA-4 CTLA-4 RANGO CTLA-4 CTLA-4 CTLA-4 CTLA-4 CTLA4 CD28/CTLA-4 CTLA-4 CTLA-4 CTLA-4 CTLA-4 cytotoxic T-lymphocyte antigen-4 CTLA-4 CTLA-4 CTLA-4 CTLA4 CTLA-4 CTLA-4 CTLA-4 cytotoxic T-lymphocyte-associated protein 4 CTLA-4 CTLA-4 CTLA-4 CD152 CTLA-4 CTLA-4 CTLA-4 English CTLA-4 CTLA4 CTLA-4 CTLA-4 CTLA-4 https://en.wikipedia.org/wiki/CTLA-4 CTLA-4 CTLA-4 cytotoxic-T-lymphocyte-associated protein 4 CTLA4 cytotoxic T-lymphocyte-associated protein 4 CTLA-4 CTLA-4 CTLA4 CTLA-4 cytotoxic T-lymphocyte-associated protein 4 CTLA-4 cytotoxic T-lymphocyte-associated protein 4 CTLA-4 CTLA-4 en CTLA-4 CTLA-4 cytotoxic T-lymphocyte-associated protein 4 CTLA-4 CTLA-4 CTLA-4 CTLA-4 CTLA-4 CTLA-4 cytotoxic T-lymphocyte-associated protein 4 CTLA-4 CTLA4 CD152 CTLA-4 cytotoxic T-lymphocyte-associated protein 4 CTLA-4 CTLA-4 CTLA-4 CTLA-4 CTLA-4 to “switch off” immune killer cells CTLA-4 CTLA-4 cytotoxic T-lymphocyte-associated protein 4 cytotoxic T-lymphocyte-associated protein 4 CTLA-4 CTLA-4 English CTLA-4 CTLA4 CTLA-4 CTLA-4 English CTLA-4