A compound attribute that is the ratio of amount of scavenger receptor class A member 5 (human) in blood to amount of scavenger receptor class F member 2 (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2053325 (SCARA5/SCARF2 protein level ratio in blood). Also known as: the ratio of amount of scavenger receptor class A member 5 (human) in blood to amount of scavenger receptor class F member 2 (human) in blood.