MX1 and leukemia: The enrichment of these populations was also observed in the peripheral blood, where only 0.04% and 0.10% of the cells from peripheral blood of E/F; control mice were CD43+/CD45− and CD71+/CD117+, respectively, compared to 24.57% and 21.96% in E/F; Mx1-cre mice with leukemia (Figure 2B).