The phosphate ester bond is hydrolyzed by the action of a phosphatase — an enzyme that removes a phosphate group from its substrate by hydrolyzing phosphoric acid monoesters into a phosphate ion and a molecule with a free hydroxyl group (dephosphorylation).[3]
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^Lee CC, Schrier WH, Nagyvary J (January 1979). "The enzymatic hydrolysis of the phosphate ester bond in some thionucleotides". Biochimica et Biophysica Acta (BBA) - Nucleic Acids and Protein Synthesis. 561 (1): 223–231. doi:10.1016/0005-2787(79)90505-7. PMID84687.