Fig. 1. Expression of zebrafish crb2 genes. (A) moe and crb2a are expressed in the brain, eye and nose (arrows) at 30 hpf; crb2b is expressed in the nose (arrow) and weakly or not at all in the brain and eye. (B) moe and crb2a are expressed in photoreceptors, cells in the inner nuclear layer, progenitor cells in the periphery and cells in the anterior chamber at 7 dpf; crb2b expression is detected in a small number of newly differentiating photoreceptors near the ciliary margin (arrows) and in cells in the anterior chamber (arrowheads). (C) Zebrafish moe and crb2a are expressed in photoreceptors and cells in the inner nuclear layer in adults. (D) Mouse ymo1, crb1 and crb2 are expressed in photoreceptors and cells in the inner nuclear layer in the adult. Scale bars: 100 µm. INL, inner nuclear layer; PR, photoreceptors.