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A potent and reversible inhibitor of the gastric H+/K+ ATPase proton pump with potassium-competitive acid blocking (P-CAB) activity. Soraprazan binds very specifically, competitively and reversibly to the potassium binding site of the proton pump hydrogen-potassium adenosine triphosphatase (H+/K+ ATPase), thereby inhibiting the pump\'s activity and the parietal cell secretion of H+ ions into the gastric lumen, the final step in gastric acid production.
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