Kinetics of IL-6 production in (A) BALB/c BMCMCs or (B) Cl.MC/C57.1 cells that had been stimulated with rrSCF (50 ng/mL; ▪) or IgE and DNP-HSA (10 ng/mL; ▧; n = 4 to 5 per point). *P < .001 versus values for unstimulated control cells (□; n = 4 to 5 per point); †P < .0001 versus values for IgE/DNP-HSA–stimulated cells.