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Fig. 3
The expression pattern of fgf24 in the pectoral fin primordia. (A) Transverse section through a wild-type embryo at 18 hpf at the level of the pectoral fin primordia. Note the prominent expression in the mesenchyme. (B) Transverse section through the pectoral fin primordium of a wild-type embryo at 24 hpf. Note that fgf24 is still strongly expressed in the mesenchyme, but not the ectoderm. (C) A wild-type pectoral fin bud at 32 hpf. fgf24 has been downregulated in the mesenchyme, and is now expressed in the AER. Scale bars: 50 µm.
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