title: Axial structure development in ultraviolet-irradiated (notochord-defective) amphibian embryos.
mesh_terms: D000818:Animals; D002490:Central Nervous System / Q000196:embryology* / Q000528:radiation effects / Q000648:ultrastructure; D004625:Embryo, Nonmammalian / Q000502:physiology*; D008855:Microscopy, Electron, Scanning; D009672:Notochord / Q000502:physiology* / Q000528:radiation effects; D014466:Ultraviolet Rays; D014982:Xenopus laevis / Q000196:embryology