A compound attribute that is the ratio of amount of breakpoint cluster region protein (human) in blood to amount of MIT domain-containing protein 1 (human) in blood. The trait is BCR/MITD1 protein level ratio in blood (OBA_2053244, an Ontology of Biological Attributes id). Also known as: the ratio of amount of breakpoint cluster region protein (human) in blood to amount of MIT domain-containing protein 1 (human) in blood.