Fig. 6. In vivo analysis of neural crest and neural plate patterning after modification of Wnt signaling. (A,B) Control embryos stained for Slug and Krox20 at stage 19. (C,D) Wnt8 mRNA injections (50 pg) are followed by the extension of Slug and Krox 20 domains together, in the posterior parts of the embryos (arrows). (E,F) dnWnt8 mRNA injections (50 pg) result in reduction of both Slug and Krox 20 expression (arrows).