q-dihydrobiopterin + NADH + H+ => tetrahydrobiopterin + NAD+ (Dictyostelium discoideum)
q-dihydrobiopterin + nadh + h+ => tetrahydrobiopterin + nad+ (dictyostelium discoideum)
q-dihydrobiopterin + NADH + H+ => tetrahydrobiopterin + NAD+ (Dictyostelium discoideum)
q-dihydrobiopterin + nadh + h+ => tetrahydrobiopterin + nad+ (dictyostelium discoideum)