ATP-ase activity Amines Ammonium compounds Ammonium ions Animals Binding Sites Binding energy Binding kinetics Binding reactions Binding sites Dogs Electric Conductivity Electric fault currents Enzyme Inhibitors Enzymes Extracellular Extracellular Space Homology models Initial rate Ion binding Ion exchange Ion transports Ions Membrane Potentials Membrane potentials Minimum value Models, Biological Models, Molecular Nitro Compounds Optical devices