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Expression of mRNAs for Dkk-1 and Hex in WT and Otx2−/− embryos at 6.5 and 7.5 dpc. (A and B) Expression of Dkk-1 mRNA at 6.5 dpc in WT and Otx2−/− embryos, respectively. (C and D) Expression of Hex mRNA at 6.5 dpc in WT and Otx2−/− embryos, respectively. (E and F) Same as C and D at 7.5 dpc. (Scale bar: 100 μm.)
