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Fig. 2. Xfz3 and Xwnt1 are co-expressed in developing neural tissues. (A) Whole-mount in situ analysis of Xfz3 and Xwnt1 in neurula stage embryos (top, stage 18) and early tadpoles (bottom, stage 25). (B) Embryos were harvested at stages indicated and expression of dorsal neural markers was assessed by RT-PCR. Fgf receptor (FGFR1) was used as a loading control.