A compound attribute that is the ratio of amount of junctional adhesion molecule A (human) in blood to amount of platelet glycoprotein Ib alpha chain (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2055319 (F11R/GP1BA protein level ratio in blood). Also known as: the ratio of amount of junctional adhesion molecule A (human) in blood to amount of platelet glycoprotein Ib alpha chain (human) in blood.