PAG1/USP8 protein level ratio in blood (Ontology of Biological Attributes entry OBA_2055152) can be described as follows. A compound attribute that is the ratio of amount of phosphoprotein associated with glycosphingolipid-enriched microdomains 1 (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood. Also known as: the ratio of amount of phosphoprotein associated with glycosphingolipid-enriched microdomains 1 (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood.