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Fig. 6
Boz and Nodal signaling are not required for initiation of dorsal dpr1 or dpr2 expression. Embryos are at sphere stage. A,B,E,F: Embryos from a boz intercross (Uninj.). C,D,G,H: Embryos from boz intercross injected with atv RNA. There was no discernible difference between dpr1 or dpr2 expression in wild-type embryos compared with embryos from boz carriers or boz carriers injected with atv RNA. A,C,E,G are lateral views. B,D,F,H are animal views. Dorsal is to the right.