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CD99 and CD34 expression pattern by double-immunofluorescence staining in the fetal epidermis and hair follicles at 20 weeks of gestation. (A) Overall expression pattern of CD99 (red) and CD34 (green). Dermal papilla expresses both CD99 (red) and CD34 (green) (arrow). (B, C) Epidermal basal cells and basaloid cells in the bulge (arrowhead) express only CD99.
