Expression of Nub1 in the embryonic and postnatal mouse retina. Mouse Nub1 development in situ. Digoxygenin in situ hybridization of Nub1 mRNA is shown from embryonic day12 (E12) through to postnatal day 16 (P16). pcl, progenitor cell layer; gcl, ganglion cell layer; inl, inner nuclear layer; onl, outer nuclear layer; is, photoreceptor inner segments; P16 sense, sense control for background. Photographs were taken at 400×.