Ontology of Biological Attributes id OBA_2053324 (SCAMP3/VPS53 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of secretory carrier-associated membrane protein 3 (human) in blood to amount of vacuolar protein sorting-associated protein 53 homolog (human) in blood. Also known as: the ratio of amount of secretory carrier-associated membrane protein 3 (human) in blood to amount of vacuolar protein sorting-associated protein 53 homolog (human) in blood.