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Cell surface expression of ACET, CD4, ACET/CD4-5, and CD4/ACET-1. HeLa cells transfected with ACET, CD4, ACET/CD4-5F, or CD4/ACET-1 expression vectors were processed for indirect immunofluorescence analysis as described. Anti-ACE or anti-CD4 antibody and appropriate fluorescein conjugated IgGs were used to detect the proteins expressed intracellularly (Internal) or on the cell surface (Surface). (Bar = 10 μm.)
