A compound attribute that is the ratio of amount of cytochrome c oxidase subunit 5B, mitochondrial (human) in blood to amount of methionine aminopeptidase 1D, mitochondrial (human) in blood. The trait is COX5B/METAP1D protein level ratio in blood (OBA_2053853). Also known as: the ratio of amount of cytochrome c oxidase subunit 5B, mitochondrial (human) in blood to amount of methionine aminopeptidase 1D, mitochondrial (human) in blood.