We compared the transcriptomes of primary leukemic cells from KMT2A/MLL-R+vs. KMT2A/MLL-R- AML and ALL patients with an emphasis on the relative gene expression levels of for 21 PTK, including ERBB1, FGR, FLT3, FYN, HCK, JAK2, LCK, LYN, MERTK, SRC, BLK, BMX, BTK, ERBB2, ERBB3, JAK1, JAK3, PTK2, SYK, TEC, TYK2. The gene discussed is PTK2; the disease is acute lymphoblastic leukemia.