F2R/SNX9 protein level ratio in blood (OBA_2055333) can be described as follows. A compound attribute that is the ratio of amount of proteinase-activated receptor 1 (human) in blood to amount of sorting nexin-9 (human) in blood. Also known as: the ratio of amount of proteinase-activated receptor 1 (human) in blood to amount of sorting nexin-9 (human) in blood.