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Whole mount in situ hybridyzation of E9.5 (22–26 somites) wt (a,c,e,g,i) and β-cateninstab (b,d,f,h,j) embryos using probes against Gbx2 (a,b), Otx2 (c,d), Shh (e,f), Gli1 (g,h), Pax3 (i,j). Arrows indicate changes in gene expression. In g and h, the embryos have 21–22 somites.
