A compound attribute that is the ratio of amount of early activation antigen CD69 (human) in blood to amount of scavenger receptor class F member 1 (human) in blood. The trait is Ontology of Biological Attributes term OBA_2053356 (CD69/SCARF1 protein level ratio in blood). Also known as: the ratio of amount of early activation antigen CD69 (human) in blood to amount of scavenger receptor class F member 1 (human) in blood.