Anti-opsin, anti-chat, parvalbumin, and s100 as specific markers of subpopulation cells in N. guentheri retina. (a) Anti-Opsin immunoreactivity in the cytoplasmatic prolongation of RPE (arrowheads) and in the rods (red arrows) of PRL. (b) Anti-chat immunoreactivity in the cytoplasmatic prolongation of RPE (arrowheads); in the outer segment of the photoreceptor layer (red arrows); in different subpopulations of ACs (white and red gallon-arrows). (c) Parvalbumin immunoreactivity in the cytoplasmatic prolongation of RPE (arrowheads); in the outer segment (red arrows) and inner segment (white arrows) of PRL; in the ACs (gallon-arrows); in the BCs (yellow arrows) of INL; in the cellular prolongation in IPL (blue arrows); in the soma of GCs (asterisk). (d) s100p immunoreactivity in the cytoplasmatic prolongation of RPE (arrowheads); in the outer segment (red arrows) and inner segment (white arrows) in PRL; in the BCs (yellow arrows), HCs (white bold arrows), ACs (gallon arrows) in the INL; in cellular prolongation of the IPL (blue arrows); in the soma of GCs (asterisk). Magnification 40×. Scale bar 20 µm.