Pig retinal cryosections labeled immunohistochemicaly for calretinin, calbindin, and GAD65. A: Ganglion (thick arrows), amacrine (thin arrows) and horizontal cells (arrowheads) are calretinin-labeled in GW9 retina. GCL, IPL, amacrine and horizontal cells are calretinin-positive in 1W retina (B) and 6M (C) retina. Cells in the GCL, amacrine (thick arrows), differentiating horizontal (arrowheads), and putative cones (thin arrows) are calbindin-positive in GW9 retina. GCL, IPL, amacrine, horizontal cells, and cones (thin arrows) are calbindin-positive in 1W (E) and 6M (F) retina. G: GCL, IPL, amacrine (arrows) and horizontal cells (arrowheads) are GAD65-positive in GW9 retina. IPL, cells in the GCL (thick arrows), amacrine cells (thin arrows) and OPL (arrowheads) are GAD65-positive in 1W (H) and 6M (I) retina. Nuclei are labeled with PI (red).