A compound attribute that is the ratio of amount of TBC1 domain family member 23 (human) in blood to amount of vacuolar protein sorting-associated protein 53 homolog (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2053036 (TBC1D23/VPS53 protein level ratio in blood). Also known as: the ratio of amount of TBC1 domain family member 23 (human) in blood to amount of vacuolar protein sorting-associated protein 53 homolog (human) in blood.