5-dehydro-D-gluconate + NADPH + H(+) => L-idonate + NADP(+)
5-dehydro-d-gluconate + nadph + h(+) => l-idonate + nadp(+)
5-dehydro-D-gluconate + NADPH + H(+) => L-idonate + NADP(+)
5-dehydro-d-gluconate + nadph + h(+) => l-idonate + nadp(+)