A compound attribute that is the ratio of amount of beta-Ala-His dipeptidase (human) in blood to amount of epidermal growth factor receptor (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2054897 (CNDP1/EGFR protein level ratio in blood). Also known as: the ratio of amount of beta-Ala-His dipeptidase (human) in blood to amount of epidermal growth factor receptor (human) in blood.