A compound attribute that is the ratio of amount of plasminogen activator inhibitor 1 (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2055762 (SERPINE1/USP8 protein level ratio in blood). Also known as: the ratio of amount of plasminogen activator inhibitor 1 (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood.