A compound attribute that is the ratio of amount of proteinase-activated receptor 1 (human) in blood to amount of platelet glycoprotein VI (human) in blood. The trait is F2R/GP6 protein level ratio in blood (OBA_2055327). Also known as: the ratio of amount of proteinase-activated receptor 1 (human) in blood to amount of platelet glycoprotein VI (human) in blood.