Pyrophosphatase

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Pyrophosphatases, also known as diphosphatases, are acid anhydride hydrolases that act upon diphosphate bonds.^[1]

Examples include:

• Inorganic pyrophosphatase, which acts upon the free pyrophosphate ion
• Tobacco acid pyrophosphatase, which catalyses the hydrolysis of a phosphoric ester
• Various organic pyrophosphatases, which act upon organic molecules with the pyrophosphate group (but excluding triphosphatases that act on the final bond):
  • Thiamine pyrophosphatase

• List of EC numbers (EC 3) § 3.6.1: In phosphorus-containing anhydrides

• Pyrophosphatases at the U.S. National Library of Medicine Medical Subject Headings (MeSH)