keto-L-sorbose + NADP(+) => 5-dehydro-D-fructose + NADPH + H(+)
keto-l-sorbose + nadp(+) => 5-dehydro-d-fructose + nadph + h(+)
keto-L-sorbose + NADP(+) => 5-dehydro-D-fructose + NADPH + H(+)
keto-l-sorbose + nadp(+) => 5-dehydro-d-fructose + nadph + h(+)