Those are two different molecules with the same function.

来源: 于 2018-10-02 06:54:05 [旧帖] [给我悄悄话] 本文已被阅读：次

PD-1 and CTLA-4

PD-1 is expressed on the surface of activated T cells, B cells, and macrophages. CTLA-4 is limited to T-cell.