Brahma-related gene 1 ( Brg1 ) expression profile during mouse ocular development. (A-I) Sagittal sections were immunostained with antibody recognizing Brg1 (brown) and counterstained lightly with hematoxylin (purple) at embryonic days E10.5 (A), E11.5 (B), E14.5 (C) and E16.5 (D and E), as well as postnatal day P21 (F-I). Higher-magnification areas stained with the Brg1 antibody indicated in (D) are shown in (E). (G-I) Brg1 at different ocular regions of (F). C: cornea, Ep: cornea epithelium, GCL: ganglion cell layer, INL: inner nuclear layer, L: lens, NR: neural retina, OC: optic cup, ON: optic nerve, P: photoreceptors, PM: periocular mesenchyme, SE: surface ectoderm, T: transition zone. Magnification: (A), ×460; (B and C), ×320; (D), ×250; (E), ×400; (F), ×60; and (G-I), ×320.