A compound attribute that is the ratio of amount of early activation antigen CD69 (human) in blood to amount of plexin-B3 (human) in blood. The trait is OBA_2053352 (CD69/PLXNB3 protein level ratio in blood). Also known as: the ratio of amount of early activation antigen CD69 (human) in blood to amount of plexin-B3 (human) in blood.