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Fig. 3 crkl mRNA is expressed in the developing nervous system in zebrafish. A–F, Lateral whole mount and (A′–F′) dorsal whole mount images of in situ hybridization embryos for crkl expression at 18 hpf–72 hpf stages. Twenty micron transverse sections through the forebrain (A″–F″) and hindbrain (C″–F″) at the lines indicated in (A–F). G, Lateral and (G′) dorsal images of sense control probe on 48 hpf embryos. Scale bar at 250 μm (A) and 75 μm (A″). CMZ, ciliary marginal zone; DT, dorsal thalamus; FB, fin bud; FBr, forebrain; MBH, midbrain-hindbrain boundary; MO, medulla; oc, optic chiasm; OpV, optic vesicle; V4, fourth ventricle; OV, otic vesicle; Po, preoptic region; PT, posterior tuberculum; R, retina; RGCL, retinal ganglion cell layer; TeVe, tectal ventricle; TeO, optic tectum; VT, ventral thalamus