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Loss of Dlx3b/4b results in compromised OEPD induction. In situ hybridization of pax8 (A-D), sox9a (E-H) and pax2a (I-P) at early OEPD (two and five somites) and placodal (12 somites) stages in wild-type control embryos (A,E,I,M), dlx3b/4b mutants (B,F,J,N), foxi1 mutants (C,G,K,O) and dlx3b/4b; foxi1 double mutants (D,H,L,P). (A-L) Dorsal views with anterior to the left. (M-P) Dorsolateral views with anterior to the left. Scale bar: 40 µm.
