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Reference.org
Pyrophosphatase
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<p>Pyrophosphatases, also known as diphosphatases, are <a href="/facts/Acid_anhydride_hydrolases/r1lgoFIk">acid anhydride hydrolases</a> that act upon <a href="/facts/Diphosphate/L9FPEkhF">diphosphate</a> bonds. </p><p>Examples include: </p> <ul><li><a href="/facts/Inorganic_pyrophosphatase/xImLrma3">Inorganic pyrophosphatase</a>, which acts upon the free pyrophosphate ion</li> <li><a href="/facts/Tobacco_acid_pyrophosphatase/Ll8w1xPd">Tobacco acid pyrophosphatase</a>, which catalyses the hydrolysis of a <a href="/facts/Phosphoric_ester/FoUAIIw4">phosphoric ester</a></li> <li>Various organic pyrophosphatases, which act upon organic molecules with the pyrophosphate group (but excluding triphosphatases that act on the final bond): <ul><li><a href="/facts/Thiamine_pyrophosphatase/98QJfwWE">Thiamine pyrophosphatase</a></li></ul></li></ul>