1.5.1.39 FMN reductase [NAD(P)H] 5,6-dimethylbenzimidazole biosynthesis I (aerobic) 1.13.11.79 aerobic 5,6-dimethylbenzimidazole synthase 5,6-dimethylbenzimidazole biosynthesis I (aerobic) 2.7.1.26 riboflavin kinase 5,6-dimethylbenzimidazole biosynthesis I (aerobic)