Figure 1

Purity of Mast cells. A. Flow cytometry analysis of intracellular chymase expression. Human cord blood-derived mast cells labelled for intracellular mast-cell chymase expression (solid line), isotype control (Black area). Results shown are representative of four separate experiments. B. Toluidine blue staining of mast cells. Fluorescence microscopy of human cord blood-derived mast cells stained with Toluidine blue. Results shown are representative of at least three separate experiments. C. Flow cytometry analysis of cell surface expression of c-kit and FcεRI. Human cord blood-derived mast cells labelled for cell-surface expression of c-kit and FceRI (left panel), and isotype controls (right panel). Results shown are representative of four separate experiments.