(R)-pantoate + NAD(+) <=> (R)-4-dehydropantoate + NADH + H(+)
(r)-pantoate + nad(+) <=> (r)-4-dehydropantoate + nadh + h(+)
(R)-pantoate + NAD(+) <=> (R)-4-dehydropantoate + NADH + H(+)
(r)-pantoate + nad(+) <=> (r)-4-dehydropantoate + nadh + h(+)