Photograph of a mouse retina and the results of immunohistochemistry. A Transplanted retinal progenitor cells survived and migrated into the inner retina. B, C Immunohistochemistry showed HNu- and OPN1SW-positive cells in the inner retina. Mouse photoreceptors in the outer retina expressed OPN1SW, but not HNu. D Merged image with DAPI nuclear staining. Scale bars 50 μm. HNu human nuclei, OPN1SW opsin 1 short-wave-sensitive, DAPI 4, 6-diamidino-2-phenylindole