title: Interrelationships among epidermal Na-K ATPase, developmental stage and length of Rana catesbeiana tadpoles.
abstract: Sodium and potassium activated adenosine triphosphatase (Na-K ATPase) was extracted from the skin of Rana catesbeiana tadpoles and adults. Using carefully staged tadpoles, it was noted that the enzyme level increases two or three stages before there is a perceptible potential difference generated across the skin. The level of non-ouabain-inhibitable ATPase remains constant throughout the life cycle. It was also concluded that Rana catesbeiana tadpoles cannot be reliably staged using length as a key trait.
mesh_terms: D000375:Aging; D000818:Animals; D008675:Metamorphosis, Biological; D011892:Rana catesbeiana / Q000254:growth & development*; D012867:Skin / Q000201:enzymology / Q000254:growth & development*; D000254:Sodium-Potassium-Exchanging ATPase / Q000378:metabolism*
chemical_list: D000254:Sodium-Potassium-Exchanging ATPase