(R)-pantoate + NADP(+) <=> 2-dehydropantoate + NADPH + H(+)
(r)-pantoate + nadp(+) <=> 2-dehydropantoate + nadph + h(+)
(R)-pantoate + NADP(+) <=> 2-dehydropantoate + NADPH + H(+)
(r)-pantoate + nadp(+) <=> 2-dehydropantoate + nadph + h(+)