BCAN/CD200 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2053620) can be described as follows. A compound attribute that is the ratio of amount of brevican core protein (human) in blood to amount of OX-2 membrane glycoprotein (human) in blood. Also known as: the ratio of amount of brevican core protein (human) in blood to amount of OX-2 membrane glycoprotein (human) in blood.