The genes for several additional PTK showed augmented expression in KMT2A/MLL-R+ infant ALL cells, including TEC, SRC, BLK, JAK2, BTK, PTK (3 probesets), SYK and JAK1 (2 probesets) [Supplementary Figure 1; Supplementary Table 1]. This evidence concerns the gene JAK2 and acute lymphoblastic leukemia.