L-idonate + NAD(+) => 5-dehydro-D-gluconate + NADH + H(+)
l-idonate + nad(+) => 5-dehydro-d-gluconate + nadh + h(+)
L-idonate + NAD(+) => 5-dehydro-D-gluconate + NADH + H(+)
l-idonate + nad(+) => 5-dehydro-d-gluconate + nadh + h(+)