A compound attribute that is the ratio of amount of aminopeptidase N (human) in blood to amount of coxsackievirus and adenovirus receptor (human) in blood. The trait is ANPEP/CXADR protein level ratio in blood (Ontology of Biological Attributes id OBA_2054279). Also known as: the ratio of amount of aminopeptidase N (human) in blood to amount of coxsackievirus and adenovirus receptor (human) in blood.