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CD99 and CD34 expression pattern by double-immunofluorescence staining in normal adult epidermis and hair follicles. (A) Overall expression pattern of CD99 (red) and CD34 (green). Epidermal basal cells (arrowhead) (B) and basaloid cells (C) in the bulge only express CD99 but not CD34. (D) Some cells in the lower outer root sheath show co-expression of CD99 and CD34 (arrow) (horizontal section).
