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The enzyme D-arabinonolactonase (EC 3.1.1.30) the reaction

D-arabinono-1,4-lactone + H₂O ${\displaystyle \rightleftharpoons }$ D-arabinonate

This enzyme belongs to the family of hydrolases, specifically those acting on carboxylic ester bonds. The systematic name is D-arabinono-1,4-lactone lactonohydrolase.

• Palleroni NJ, Doudoroff M (August 1957). "Metabolism of carbohydrates by Pseudomonas saccharophila. III. Oxidation of D-arabinose". Journal of Bacteriology. 74 (2): 180–5. PMC 289912. PMID 13475218.