Glutathione Reductase human The biochemical pathway that makes BH4 requires GTP as the substrate and three dedicated enzymes (GTP cyclohydrolase I, 6pyruvoyltetrahydropterin synthase, and sepiapterin reductase); the key redox cofactors used in the pathway and Full article: An in silico approach to identify bioactive phytochemicals from Houttuynia cordata Thunb. As potential inhibitors of human glutathione reductase Question: Riboflavin nutritional status is assessed by measurement of which of the following enzymes after addition of FAD in vitro? (A): Transketolase (B): Glutathione reductase (C): Transaminase (D): Transaldolase Let us know