KLRK1 and neoplasm: Expression of the NK cell receptors DNAM-1, CD96 and NKG2D, the degranulation marker CD107a, and the cytokines IFN-γ and TNF, were similar in NK cells derived from tumor bearing B6-MAITcast MR1 WT and B6-MAITcast MR1−/− mice (Supplementary Fig. 1i).