Similarly, using PRM-MS, the IDH2R140Q -derived SPNGTIQNIL peptide was detected on K562-R140Q cells transduced with HLA-B*07:02 and the full-length IDH2R140Q gene (Figure 2D), but not on K562-R140Q cells transduced with HLA-B*07:02, nor on HLA-B*07:02-positive patient-derived AML cells with an IDH2R140Q mutation (AML 9448) (Figure S3B). Here, HLA-B is linked to acute myeloid leukemia.