D-gluconate + NADP(+) <=> 2-dehydro-D-gluconate + NADPH + H(+)
d-gluconate + nadp(+) <=> 2-dehydro-d-gluconate + nadph + h(+)
D-gluconate + NADP(+) <=> 2-dehydro-D-gluconate + NADPH + H(+)
d-gluconate + nadp(+) <=> 2-dehydro-d-gluconate + nadph + h(+)