CD84/F2R protein level ratio in blood (OBA_2053383) can be described as follows. A compound attribute that is the ratio of amount of SLAM family member 5 (human) in blood to amount of proteinase-activated receptor 1 (human) in blood. Also known as: the ratio of amount of SLAM family member 5 (human) in blood to amount of proteinase-activated receptor 1 (human) in blood.