A compound attribute that is the ratio of amount of early activation antigen CD69 (human) in blood to amount of proteinase-activated receptor 1 (human) in blood. The trait is OBA_2053348 (CD69/F2R protein level ratio in blood). Also known as: the ratio of amount of early activation antigen CD69 (human) in blood to amount of proteinase-activated receptor 1 (human) in blood.