a ubiquinone + NADH + H(+) <=> a ubiquinol + NAD(+)
a ubiquinone + nadh + h(+) <=> a ubiquinol + nad(+)
a ubiquinone + NADH + H(+) <=> a ubiquinol + NAD(+)
a ubiquinone + nadh + h(+) <=> a ubiquinol + nad(+)