title: An ultrastructural analysis of cell and matrix differentiation during early limb development in Xenopus laevis.
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D003094:Collagen; D004847:Epithelial Cells; D005121:Extremities / Q000196:embryology*; D005260:Female; D006614:Hindlimb / Q000196:embryology; D066298:In Vitro Techniques; D007365:Intercellular Junctions; D008854:Microscopy, Electron; D009024:Morphogenesis; D014981:Xenopus / Q000196:embryology*
chemical_list: D003094:Collagen