JAK2 and acute lymphoblastic leukemia: Based on the RNA-Seq data from patients with de novo Ph+ALL, JAK2 was differentially expressed and was more highly expressed in the LPC1 fraction than in the Other Cell1 fraction (1.60-fold change, P = 0.03) and was more highly expressed in the LPC2 fraction than the Other Cell2 fraction (1.79-fold change, P = 0.004).