Recombinant human SCF (HZ-1024) stimulates dose-dependent proliferation of the MO7e human megakaryoblastic leukemia cell line. Cell number was quantitatively assessed by PrestoBlue® Cell Viability Reagent. MO7e cells were treated with increasing concentrations of GMP recombinant SCF for 72 hours. The EC50 was determined using a 4-parameter non-linear regression model. The EC50 range is 15-85 ng/mL.