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Fig. 7
Targeted knock-in of fluorescent reporters into the pax2a locus. Expression of Venus or tRFP driven by the pax2a locus at 24 hpf. Images were taken from live embryos anesthetized in MS-222. (A) Left panel shows dorsal view of Venus expression in the MHB and otic vesicle (OV); right panel shows merged image of fluorescent and transmitted light channels. (B) Left panel shows dorsal view of tRFP expression in the MHB and otic vesicle. (C) Left panel: lateral view of an embryo expressing tRFP in the optic stalk (OS), MHB, OV, and hindbrain neurons (Hbn). Right panel: merged image of fluorescent and transmitted light channels. (D) pax2a:venus and pax2a:tRFP fish were crossed and resulting progeny was sorted into either single (Venus+ or tRFP+) or double positive (Venus+ and tRFP+) embryos at 24 hpf. Compared to single-positive siblings, double positive embryos show no morphological abnormalities. All images are maximum intensity projections covering 50 μm tissue with a Z-interval of 2 μm. Scale bar 100 μm.