Dynamic 3D cell rearrangements guided by a fibronectin matrix underlie somitogenesis.
Somites are transient segments formed in a rostro-caudal progression during vertebrate development.In chick embryos, segmentation of a new pair of somites occurs every 90 minutes and involves a mesenchyme-to-epithelium transition of cells from the presomitic mesoderm.Little is known about the cellular rearrangements involved, and, although it is kn