Ontology of Biological Attributes term OBA_2054614 (CTRB1/PLA2G1B protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of chymotrypsinogen B (human) in blood to amount of phospholipase A2 (human) in blood. Also known as: the ratio of amount of chymotrypsinogen B (human) in blood to amount of phospholipase A2 (human) in blood.