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Fig. 3. BrdU incorporation after Wnt1 misexpression. (A) GFP fluorescence
micrograph to show misexpression site (marked by curved bar). Arrowheads
indicate nonspecific fluorescence caused by blood cells. (B-D) Fluorescence
micrographs for BrdU incorporation. Rectangles on low-power micrograph (B)
indicate the area of C and D. The cryosections include surface ectoderm
(arrows in C and D indicate the border between neuroepithelium and the surface
ectoderm). V, ventricle; E, surface ectoderm; N, neuroepithelium; exp,
experimental side; cont, control side.