(6S)-5,6,7,8-tetrahydropteroate + NAD(+) => 7,8-dihydropteroate + NADH + H(+)
(6s)-5,6,7,8-tetrahydropteroate + nad(+) => 7,8-dihydropteroate + nadh + h(+)
(6S)-5,6,7,8-tetrahydropteroate + NAD(+) => 7,8-dihydropteroate + NADH + H(+)
(6s)-5,6,7,8-tetrahydropteroate + nad(+) => 7,8-dihydropteroate + nadh + h(+)