A compound attribute that is the ratio of amount of carbonic anhydrase 13 (human) in blood to amount of dipeptidyl peptidase 2 (human) in blood. The trait is Ontology of Biological Attributes id OBA_2055716 (CA13/DPP7 protein level ratio in blood). Also known as: the ratio of amount of carbonic anhydrase 13 (human) in blood to amount of dipeptidyl peptidase 2 (human) in blood.