L-idonate + NADP(+) => 2-dehydro-L-idonate + NADPH + H(+)
l-idonate + nadp(+) => 2-dehydro-l-idonate + nadph + h(+)
L-idonate + NADP(+) => 2-dehydro-L-idonate + NADPH + H(+)
l-idonate + nadp(+) => 2-dehydro-l-idonate + nadph + h(+)