Patterns of expression of vimentin, GFAP and TopAP in the reptile retina. Antibodies to vimentin, GFAP and TopAP were applied to vertical sections of central regions of retinas from anole, queen snake, garter snake, painted turtle and snapping turtle. The scale bar (50 μm) in panel in the bottom-right panel applies to all panels. Abbreviations: ONL – outer nuclear layer, INL – inner nuclear layer, IPL – inner plexiform layer, GCL – ganglion cell layer.