A compound attribute that is the ratio of amount of catechol O-methyltransferase (human) in blood to amount of heterogeneous nuclear ribonucleoprotein K (human) in blood. The trait is COMT/HNRNPK protein level ratio in blood (OBA_2053846). Also known as: the ratio of amount of catechol O-methyltransferase (human) in blood to amount of heterogeneous nuclear ribonucleoprotein K (human) in blood.