ADH4/SORD protein level ratio in blood (Ontology of Biological Attributes term OBA_2053636) can be described as follows. A compound attribute that is the ratio of amount of all-trans-retinol dehydrogenase [NAD(+)] ADH4 (human) in blood to amount of sorbitol dehydrogenase (human) in blood. Also known as: the ratio of amount of all-trans-retinol dehydrogenase [NAD(+)] ADH4 (human) in blood to amount of sorbitol dehydrogenase (human) in blood.