Representative retinal sections from P65 wild-type (Nmnat1wt/wt) and Six3-Cre expressing (Nmnat1wt/wt;Six3-Cre) mice labeled with antibodies against calretinin (CALR) and BRN3A (A–B), recoverin (RCVRN) and rhodopsin (RHO) (C–D), synaptophysin (SYPH) (E,F), or CHX10 (G,H). Corresponding zoom panels are indicated with dotted rectangles. n = 3 biological replicates for all panels. Scale bars, 30 μm. Abbreviations: P, postnatal day; GCL, ganglion cell layer; IPL, inner plexiform layer; OPL, outer plexiform layer; INL, inner nuclear layer; ONL, outer nuclear layer; IS/OS, photoreceptor inner segment/outer segment layer.