Molybdenum cofactor sulfurtransferase (EC 2.8.1.9, molybdenum cofactor sulfurase, ABA3, HMCS, MoCo sulfurase, MoCo sulfurtransferase) is an enzyme with systematic name L-cysteine:molybdenum cofactor sulfurtransferase. This enzyme catalyses the following chemical reaction Molybdenum cofactor sulfurtransferase (EC 2.8.1.9, molybdenum cofactor sulfurase, ABA3, HMCS, MoCo sulfurase, MoCo sulfurtransferase) is an enzyme with systematic name L-cysteine:molybdenum cofactor sulfurtransferase. This enzyme catalyses the following chemical reaction This enzyme contains pyridoxal phosphate.