A compound attribute that is the ratio of amount of platelet-derived growth factor subunit A (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood. The trait is OBA_2054052 (PDGFA/USP8 protein level ratio in blood). Also known as: the ratio of amount of platelet-derived growth factor subunit A (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood.