Figure 7. Pig retinal cryosections labeled for glial protein markers. A: Processes in the neurofiber layer, GCL, OPL, inner NBL, and developing OPL are P75^NTR-positive in GW9 retina. Processes in the GCL, IPL, and INL are P75^NTR-positive in 1W (B) and 6M (C) retina. D: Processes in the GCL (thick arrows), NBL (thin arrows), and developing OPL (arrowheads) are labeled for GS in GW9 retina. GS immunolabeling is present in the GCL, IPL, and INL in 1W (E) and 6M (F) retina. G: Immature astrocytes are GFAP-positive in GW9 retina. H: Processes in neurofiber and GCL are GFAP- positive in 1W retina. I: Elongated GFAP-positive processes in 6M retina. J-M: GFAP-immunopositive astrocytes are PKCα-positive, weakly in 1W (J, K, arrows) but strongly in 6M retina (L, M, arrows). N: A Z-stack image shows extensive double GFAP-PKCα labeling at 6M (arrows). X- and Y- planes are shown to bottom and to the right of the image.