Specification of cell fates at the dorsal margin of the zebrafish gastrula.

Abstract excerpt

Using fate mapping techniques, we have analyzed development of cells of the dorsal marginal region in wild-type and mutant zebrafish. We define a domain in the early gastrula that is located just at the margin and centered on the dorsal midline, in which most cells generate clones that develop exclusively as notochord. The borders of the notochord domain are sharp at the level of single cells, and coincide almost...

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