CALCOCO1/VPS53 protein level ratio in blood (OBA_2054844, an Ontology of Biological Attributes entry) can be described as follows. A compound attribute that is the ratio of amount of calcium-binding and coiled-coil domain-containing protein 1 (human) in blood to amount of vacuolar protein sorting-associated protein 53 homolog (human) in blood. Also known as: the ratio of amount of calcium-binding and coiled-coil domain-containing protein 1 (human) in blood to amount of vacuolar protein sorting-associated protein 53 homolog (human) in blood.