Cell surface expression of hGMR α and β subunits on thymocyte CD4 and CD8 subsets. Thymocytes from hGMR-tg mice were stained with anti-CD4, anti-CD8, and anti-hGMR α or β antibodies. CD4 and CD8 expression is indicated by dot plot with quadrant shown. Cells within each quadrant were further analyzed for hGMRα subunit (middle group of histograms) and hGMRβ subunit (right-hand group of histograms) expression. Staining profile from wild-type mice is used as background (white), whereas specific receptor staining is indicated by the shaded area.