In enzymology, a carboxylesterase is an enzyme that catalyzes the chemical reaction » a carboxylic ester + H2O ightleftharpoons an alcohol + a carboxylate Thus, the two substrates of this enzyme are carboxylic ester and H2O, whereas its two products are alcohol and carboxylate. Most enzymes from this group belong to the superfamily of hydrolases with alpha/beta protein fold (so called Alpha/beta hydrolase fold), specifically those acting on carboxylic ester bonds. Some exceptions include an est… (More on Carboxylesterase)