keto-D-fructose + a ubiquinone => 5-dehydro-D-fructose + a ubiquinol
keto-d-fructose + a ubiquinone => 5-dehydro-d-fructose + a ubiquinol
keto-D-fructose + a ubiquinone => 5-dehydro-D-fructose + a ubiquinol
keto-d-fructose + a ubiquinone => 5-dehydro-d-fructose + a ubiquinol