Flow cytometric analysis of the stromal cell surface expression of wt-SCF²⁴⁸ and wt-SCF²²⁰ orSl^17H-SCF²⁴⁸ andSl^17H-SCF²²⁰ isoforms of SCF. (Top left panel) wt-SCF²⁴⁸ (soluble), (bottom left panel)Sl^17H-SCF²⁴⁸ (soluble), (top right panel) wt-SCF²²⁰ (MA), and (bottom right panel)Sl^17H-SCF²²⁰ (MA) stromal cell lines were stained with either isotype control (solid lines) or antimouse SCF (dotted lines) antibody. Shown is 1 of 2 clones for each genotype showing similar results.