CDCP1/MSR1 protein level ratio in blood (OBA_2053409, an Ontology of Biological Attributes entry) can be described as follows. A compound attribute that is the ratio of amount of CUB domain-containing protein 1 (human) in blood to amount of macrophage scavenger receptor types I and II (human) in blood. Also known as: the ratio of amount of CUB domain-containing protein 1 (human) in blood to amount of macrophage scavenger receptor types I and II (human) in blood.