q-dihydrobiopterin + NADH + H+ => tetrahydrobiopterin + NAD+ (Drosophila melanogaster)
q-dihydrobiopterin + nadh + h+ => tetrahydrobiopterin + nad+ (drosophila melanogaster)
q-dihydrobiopterin + NADH + H+ => tetrahydrobiopterin + NAD+ (Drosophila melanogaster)
q-dihydrobiopterin + nadh + h+ => tetrahydrobiopterin + nad+ (drosophila melanogaster)