Figure 3. Cellular localization of the Mas receptor protein in retinal glial cells. Double immunostaining for glial cell markers and the Mas receptor in the mouse retina shows a low level expression of Mas in (A-C) astrocytes which are glial fibrillary acidic protein (GFAP) positive and in (D-I) Müller cell bodies that are p27^KIP1 and CRALBP positive. The nuclei were counterstained with 4',6-diamidino-2-phenylindole (DAPI). INL=inner nuclear layer; RGC=retinal ganglion cell layer. Scale bar=50 µm (A-C); 20 µm (D-I).