A compound attribute that is the ratio of amount of carboxypeptidase M (human) in blood to amount of ectonucleotide pyrophosphatase/phosphodiesterase family member 7 (human) in blood. The trait is CPM/ENPP7 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054593). Also known as: the ratio of amount of carboxypeptidase M (human) in blood to amount of ectonucleotide pyrophosphatase/phosphodiesterase family member 7 (human) in blood.