Fig. 4.

Representative figure of immunohistochemical localization of PEPT-2 in human ocular tissues. Arrowhead indicates the localization of PEPT-2 staining. PEPT-2 clearly localized in the epithelial layers of the cornea and conjunctiva and nonpigmented epithelial layer of the ciliary body. In the sclera-choroid-retina, PEPT-2 was abundantly localized in the outer segment of photoreceptor cells, RPE cell layer, and smooth muscles of choroid blood vessels. Light staining for PEPT-2 was also observed in the ganglion cell layer. Nuclei were counterstained in blue with hematoxylin.