Flow cytometry analysis of the stable CHO transfectants expressing FcγRIIIb NA1-, NA2-, and SH-isoforms. Paraformaldehyde-fixed CHO cells were stained either with NA1-specific MoAb CLB Gran 11 or with NA2-specific MoAb GRM 1, washed, and labeled with fluorescein-conjugated rabbit anti-mouse IgG.