Permeant anion activation of MgATPase activity in chromaffin granules. Evidence for direct coupling of proton and anion transport.

4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic Acid/pharmacology Adenosine Triphosphatases/metabolism Animals Anions/pharmacology Biological Transport Ca(2+) Mg(2+)-ATPase Cattle Chromaffin Granules/drug effects,enzymology Chromaffin System/enzymology Enzyme Activation Epinephrine/metabolism Hydrogen-Ion Concentration In Vitro Techniques Kinetics Membrane Potentials Osmotic Pressure Potassium Chloride/pharmacology Valinomycin/pharmacology

Anions Valinomycin 4-Acetamido-4'-isothiocyanatostilbene-2,2'-disulfonic Acid Potassium Chloride Adenosine Triphosphatases Ca(2+) Mg(2+)-ATPase Epinephrine