5,6,7,8-tetrahydropteridine + NAD(+) = 6,7-dihydropteridine + NADH + H(+)
5,6,7,8-tetrahydropteridine + nad(+) = 6,7-dihydropteridine + nadh + h(+)
5,6,7,8-tetrahydropteridine + NAD(+) = 6,7-dihydropteridine + NADH + H(+)
5,6,7,8-tetrahydropteridine + nad(+) = 6,7-dihydropteridine + nadh + h(+)