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ATPaseAn ATPase is an enzyme that catalyzes the decomposition of ATP into ADP plus an inorganic phosphate ion. This dephosphorylation is widely used in all known forms of life as a mechanism for driving energetically unfavourable reactions; as such, ATPases are rarely dedicated solely to dephosphorylating ATP, but rather couple this reaction to some other reaction and use the ATP dephosphorylation as a source of energy.
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This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "ATPase".