In enzymology, a galactolipase is an enzyme that catalyzes the chemical reaction 1,2-diacyl-3-beta-D-galactosyl-sn-glycerol + 2 H2O ⇌ {\displaystyle \rightleftharpoons } 3-beta-D-galactosyl-sn-glycerol + 2 carboxylatesThus, the two substrates of this enzyme are 1,2-diacyl-3-beta-D-galactosyl-sn-glycerol and H2O, whereas its two products are 3-beta-D-galactosyl-sn-glycerol and carboxylate. Wikipedia