menaquinone-8 + NADH + H(+) = menaquinol-8 + NAD(+)
menaquinone-8 + nadh + h(+) = menaquinol-8 + nad(+)
menaquinone-8 + NADH + H(+) = menaquinol-8 + NAD(+)
menaquinone-8 + nadh + h(+) = menaquinol-8 + nad(+)