Gr-1 and CD11b expression in cytokine-stimulated FL-8(−/−) and FL-1(+/−) cells.

Shown are FACS-generated histograms of Gr-1 and CD11b expression in FL-8(−/−) (A-C) and FL-1(+/−) (D-F) cells cultured in the indicated cytokines including (A, D) SCF plus IL-3, (B, E) GM-CSF alone for 4 days, and (C, F) GM-CSF for 2 days, followed by G-CSF (5 ng/mL) for 4 days.