A compound attribute that is the ratio of amount of charged multivesicular body protein 1a (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2055584 (CHMP1A/USP8 protein level ratio in blood). Also known as: the ratio of amount of charged multivesicular body protein 1a (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood.