5.3.3.2 2-mercaptoethanol activates 2936 5.3.3.2 2-mercaptoethanol activates isomerase III and IV 2937 5.3.3.2 dithiothreitol activates 2936, 2941 5.3.3.2 FMN required as cofactor. The enzyme requires the combined presence of FMN, NADPH and Mg2+ 651733 5.3.3.2 glutathione activates 2936 5.3.3.2 L-Cysteine hydrochloride activates 2936 5.3.3.2 mevalonic acid activates 2936 5.3.3.2 Mevalonic acid lactone weakly activates 2936 5.3.3.2 NADPH required as cofactor. The enzyme requires the combined presence of FMN, NADPH and Mg2+ 651733