A compound attribute that is the ratio of amount of all-trans-retinol dehydrogenase [NAD(+)] ADH4 (human) in blood to amount of glutathione S-transferase A1 (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2053756 (ADH4/GSTA1 protein level ratio in blood). Also known as: the ratio of amount of all-trans-retinol dehydrogenase [NAD(+)] ADH4 (human) in blood to amount of glutathione S-transferase A1 (human) in blood.