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Fig. 3
Endodermal signals are required for satb2 expression in ventral arches 2–7.
(A) At 38 hpf, satb2 is expressed robustly in the ventral pharyngeal arches and palatal precursors of wild-type embryos. (B) Expression of satb2 in the palatal precursors and ventral arch 1 is retained in sox32 mutants; however, satb2 expression is ablated in the posterior arches.
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