CD71 expression in MHCI negative and MHCI positive cells. (A) showing A representative flow cytometry analysis of the expression of MHCI and CD71 indicating that epidermal cells that exhibit lack/low expression of MHCI also exhibit lower expression of CD71 than cells that express high level of MHCI. Gates were set using isotype control antibodies and single color antibodies. The geometrical mean channel fluorescence of the populations is indicated. (B) Single positive control for PE. (C) Single positive control for FITC. (D) Isotype control.