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(+) <=> 4,4'-disulfanyldibutanoate + nadh + h(+)