KCNJ13 and retinal degeneration: With these models we confirm the previous findings regarding Kcnj13 expression and the retinal phenotype of conditional ko mice, delineate early expression patterns of Kcnj13 in the mouse eye and brain and extend these to show complete loss of the photoreceptors including the outer nuclear layer, and outer plexiform layer accompanied by extinguished ERGs and fundus findings typical for retinal degeneration in mice with widespread absence of Kcnj13 expression.