Figure 5.
7D5 antibody staining of COSphox cells compared with COSWT cells. Cells harvested by brief trypsinization were incubated with 7D5 monoclonal antibody, which recognizes an extracellular epitope of gp91phox. Following incubation with a FITC-conjugated goat anti–mouse secondary antibody, cells were analyzed by flow cytometry. The marker M1 was set to exclude 99% of the COSWT cells (open histogram), and indicates the range defined as positively stained. By this criterion, 98.3% of the COSphox cells (solid histogram) were positively stained for gp91phox expression.