5-dehydro-D-gluconate + NAD(+) => 2,5-didehydro-D-gluconate + NADH + H(+)
5-dehydro-d-gluconate + nad(+) => 2,5-didehydro-d-gluconate + nadh + h(+)
5-dehydro-D-gluconate + NAD(+) => 2,5-didehydro-D-gluconate + NADH + H(+)
5-dehydro-d-gluconate + nad(+) => 2,5-didehydro-d-gluconate + nadh + h(+)