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Fig. 7 FGF4-soaked bead implantation restores tbx5 expression but not fin bud outgrowth. (A-F) Dorsal views of bead-implanted embryos stained for tbx5 (A-B′), fgf24 (C,D) and fgf10 (E,F) at 40 hpf. (G,H) Exogenous FGF4 enhances tbx5 expression maintenance but is not sufficient to initiate fgf24 or fgf10 expression in ring1b mutants. Bead location is indicated by the white dashed circle. Pectoral fin bud outgrowth is not restored in ring1b mutants. Arrowheads indicate staining at the fin bud region.
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