A compound attribute that is the ratio of amount of scavenger receptor cysteine-rich type 1 protein M130 (human) in blood to amount of macrophage scavenger receptor types I and II (human) in blood. The trait is Ontology of Biological Attributes term OBA_2055276 (CD163/MSR1 protein level ratio in blood). Also known as: the ratio of amount of scavenger receptor cysteine-rich type 1 protein M130 (human) in blood to amount of macrophage scavenger receptor types I and II (human) in blood.