A compound attribute that is the ratio of amount of chymotrypsin-like elastase family member 3A (human) in blood to amount of chymotrypsinogen B (human) in blood. The trait is CELA3A/CTRB1 protein level ratio in blood (OBA_2054255). Also known as: the ratio of amount of chymotrypsin-like elastase family member 3A (human) in blood to amount of chymotrypsinogen B (human) in blood.