The separation and partial purification of membrane-bound (Na + + K + )-dependent Mg 2+ -ATPase and (Na + +K + (Na + +K + )-independent Mg 2+ -ATPase from frog skeletal muscle.

Adenosine Triphosphatases/antagonists & inhibitors,isolation & purification Adenosine Triphosphate/pharmacology Animals Anura Azides/pharmacology Bile Acids and Salts/pharmacology Calcium Chloride/pharmacology Cell Membrane/enzymology Centrifugation, Density Gradient Cholesterol/analysis Enzyme Activation Magnesium/pharmacology Microscopy, Electron Microsomes/enzymology Muscles/cytology,enzymology Ouabain/pharmacology Phospholipids/analysis Potassium Chloride/pharmacology Rana catesbeiana Sarcoplasmic Reticulum/enzymology Sodium Chloride/pharmacology Ultracentrifugation Urea/pharmacology

Azides Bile Acids and Salts Phospholipids Sodium Chloride Ouabain Potassium Chloride Adenosine Triphosphate Urea Cholesterol Adenosine Triphosphatases Magnesium Calcium Chloride