1.8.7.1 coenzyme F420 - 674504 1.8.7.1 NADPH NADPH as an additional electron donor to methyl viologen enhances enzyme activity by 1.6fold 726144 1.8.7.1 NADPH NADPH as an additional electron donor to methyl viologen enhances enzyme activity by 2.8fold 726144 1.8.7.1 NADPH the addition of NADPH to the reaction medium increases enzyme activity by 1.6fold 726144 1.8.7.1 NADPH the addition of NADPH to the reaction medium increases enzyme activity by 2.8fold 726144 1.8.7.1 tungstic acid stimulates activity 726144