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Figure 7


Fig. 7. Early patterning of the chick non-neural ectoderm is regulated by temporal exposure to Wnt and BMP signals. Proposed Wnt and BMP signaling events required for the specification of rostral and caudal neural plate border cells, and of epidermal cells. (A) An early phase of Wnt signals and a late phase of BMP signals specify rostral neural plate border cells of olfactory and lens placodal (OLP) character. (B) An early phase of Wnt signals and a late phase of both Wnt and BMP signals specify caudal neural plate border cells of neural crest (NC) character. (C) An early and a late phase of both Wnt and BMP signals specify cells of epidermal character.





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