Figure 5. Immunohistochemistry. A and B: Complement C3 was predominantly expressed in the retinal nerve fiber layer, inner plexiform layer, outer plexiform layer, and outer nuclear layer (Scale bar = 100 μm). Reaction color: Brown. Abbreviations: NFL: nerve fiber layer; GCL: ganglion cell layer; IPL: inner plexiform layer; INL: inner nuclear layer; OPL: outer plexiform layer; ONL: outer nuclear layer; PS: photoreceptor segments.