Ontology of Biological Attributes term OBA_2055380 (CD244/GP1BA protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of natural killer cell receptor 2B4 (human) in blood to amount of platelet glycoprotein Ib alpha chain (human) in blood. Also known as: the ratio of amount of natural killer cell receptor 2B4 (human) in blood to amount of platelet glycoprotein Ib alpha chain (human) in blood.