hydroxyacylglutathione hydrolase (EC 3.1.2.6, also known as, glyoxalase II; S-2-hydroxylacylglutathione hydrolase; hydroxyacylglutathione hydrolase; acetoacetylglutathione hydrolase). In the second step of the glycoxlase system this enzyme hydrolyzes S-d-lactoylglutathione to d-lactate and regenerates glutathione in the process. It has broad substrate specificity for glutathione thiol esters, hydrolyzing a number of these species to their corresponding carboxylic acids and reduced glutathione. It appears to hydrolyze 2-hydroxy thiol esters with greatest efficiency. It belongs to the MBL-fold metallo-hydrolase superfamily which is comprised mainly of hydrolytic enzymes which carry out a variety of biological functions.