Fewer numbers of Lyn-deficient mast cells reach S phase after stimulation with SCF.

Wild-type (—) and Lyn-deficient (- - -) mast cells were incubated in 100 ng/mL murine SCF. At the times indicated, cells were assessed for cell-cycle progression as described in “Materials and methods.” The experiment was performed 3 times, and the data shown are representative of the results of each.