...Andrew D. Chalmers; Bernhard Strauss; Nancy Papalopulu A key feature of early vertebrate development is the formation of superficial, epithelial cells that overlie non-epithelial deep cells. In Xenopus , deep and superficial cells show a range of differences,including a different competence...

...Cathy Lundmark ABSTRACT Vital dye staining and cell lineage tracers were used to mark superficial cells of early Ambystoma mexicanum gastrulae. Superficial marks placed between the equator and the blastopore, on the dorsal midline, stained notochord, whereas marks or injections made at similar...