A compound attribute that is the ratio of amount of L-xylulose reductase (human) in blood to amount of kynureninase (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2054068 (DCXR/KYNU protein level ratio in blood). Also known as: the ratio of amount of L-xylulose reductase (human) in blood to amount of kynureninase (human) in blood.