A compound attribute that is the ratio of amount of all-trans-retinol dehydrogenase [NAD(+)] ADH4 (human) in blood to amount of L-xylulose reductase (human) in blood. The trait is ADH4/DCXR protein level ratio in blood (OBA_2053755). Also known as: the ratio of amount of all-trans-retinol dehydrogenase [NAD(+)] ADH4 (human) in blood to amount of L-xylulose reductase (human) in blood.