A compound attribute that is the ratio of amount of carboxypeptidase A1 (human) in blood to amount of chymotrypsinogen B (human) in blood. The trait is CPA1/CTRB1 protein level ratio in blood (OBA_2053855). Also known as: the ratio of amount of carboxypeptidase A1 (human) in blood to amount of chymotrypsinogen B (human) in blood.