4,4'-disulfanyldibutanoate + NADH + H(+) => 2 4-sulfanylbutanoate + NAD(+)
4,4'-disulfanyldibutanoate + nadh + h(+) => 2 4-sulfanylbutanoate + nad(+)
4,4'-disulfanyldibutanoate + NADH + H(+) => 2 4-sulfanylbutanoate + NAD(+)
4,4'-disulfanyldibutanoate + nadh + h(+) => 2 4-sulfanylbutanoate + nad(+)