(A) Differentiation of CD34⁺ cells in StemPro culture medium. Morphology of cells stimulated to differentiate into granulocytes by kit ligand, interleukin-3 (IL-3), and granulocyte-colony-stimulating factor (G-CSF) in StemPro serum-free medium. (B) Surface marker expression by CD34⁺ cells differentiating under culture conditions. (C) Cell-cycle distribution of differentiating CD34⁺ cells overtime determined by propidium iodide staining.