title: On the amount of (Na+ + K+)-ATPase available for transepithelial sodium ion transport in the amphibian skin.
abstract: Pretreatment of frog skin epithelium homogenates with sodium dodecyl sulphate in the presence of ATP reveals levels of ouabain-sensitive ATPase activity usually higher and occasionally far higher than those required to sustain maximum rates of Na+ transport. This supports the view that Na+ transport involves only a fraction of the epithelial cells.
mesh_terms: D000251:Adenosine Triphosphatases / Q000378:metabolism*; D000818:Animals; D004553:Electric Conductivity; D004848:Epithelium / Q000201:enzymology*; D010042:Ouabain / Q000494:pharmacology; D011188:Potassium / Q000494:pharmacology; D011896:Rana temporaria; D012867:Skin / Q000201:enzymology*; D012964:Sodium / Q000378:metabolism*; D012967:Sodium Dodecyl Sulfate / Q000494:pharmacology
chemical_list: D012967:Sodium Dodecyl Sulfate; D010042:Ouabain; D012964:Sodium; D000251:Adenosine Triphosphatases; D011188:Potassium