A compound attribute that is the ratio of amount of carboxypeptidase B (human) in blood to amount of chymotrypsinogen B (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2053860 (CPB1/CTRB1 protein level ratio in blood). Also known as: the ratio of amount of carboxypeptidase B (human) in blood to amount of chymotrypsinogen B (human) in blood.