Ontology of Biological Attributes id OBA_2054615 (CTRB1/PRSS2 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 trypsin-2 (human) in blood. Also known as: the ratio of amount of chymotrypsinogen B (human) in blood to amount of trypsin-2 (human) in blood.