the cytotoxic lymphoid cells were identified as natural killer ( nk ) cells , because treatment of diabetic lymphoid cells with anti-asialo gm1 serum and complement selectively removed a monoclonal antibody-defined subset of nk cells ( ox8 + ) , and the nk-depleted lymphoid cells were not cytotoxic to either islet or nk-sensitive yac-1 cells , even after culture with cona .
C0229671
serum
C0009498
complement