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The most rostral cephalic crest cells in the chick embryo first populate ubiquitously in the rostroventral head. Before the influx of crest cells, the ventral head ectoderm expresses Fgf8 in two domains that correspond to the future mandibular arch. Bmp4 is expressed rostral and caudal to these domains. The rostral part of the Bmp4 domain develops into the rostral end of the maxillary process that...
The development of the vertebrate face is a dynamic multi-step process which starts with the formation of neural crest cells in the developing brain and their subsequent migration to form, together with mesodermal cells, the facial primordia. Signalling interactions co-ordinate the outgrowth of the facial primordia from buds of undifferentiated mesenchyme into the intricate series of bones and cartilage...
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