A compound attribute that is the ratio of amount of chymotrypsinogen B (human) in blood to amount of kin of IRRE-like protein 2 (human) in blood. The trait is Ontology of Biological Attributes id OBA_2054613 (CTRB1/KIRREL2 protein level ratio in blood). Also known as: the ratio of amount of chymotrypsinogen B (human) in blood to amount of kin of IRRE-like protein 2 (human) in blood.