Human eosinophils express IRp60. FACS analysis was performed on human peripheral blood eosinophils (▪) and nasal polyp eosinophils (□) using a panel of monoclonal antibodies recognizing NK-cell inhibitory receptors. The eosinophils were incubated with mouse anti-human mAbs, followed by FITC-conjugated antimouse, and analyzed by FACS. Data are expressed as mean fluorescent intensity (MFI ± SD); n = 15 for peripheral blood and n = 10 for nasal polyp eosinophils. ^*p140 expression was observed in 25% of the examined donors.