YFP expression in the Mito-R retina. A, YFP fluorescence was observed in all or nearly all photoreceptors, as well as horizontal cells and a subset of amacrine and ganglion cells. B, YFP in the inner nuclear layer (INL) does not colocalize with ChAT, a marker of starburst amacrine cells. C, YFP in the INL does not colocalize with tyrosine hydroxylase (TH), a marker of dopaminergic amacrine cells. D, YFP in the Mito-R retinal ganglion layer (RGL). E, Mito-R retina labeled with antibodies to BRN3b, a marker of RGCs. The majority of YFP positive cells are BRN3b positive. The scale bar in (D) is equivalent to 225 μm in A and 387.5 μm in B and D, 232.5 μm in C and 62.5 μm in E.