A compound attribute that is the ratio of amount of platelet-derived growth factor subunit A (human) in blood to amount of cytosolic phospholipase A2 (human) in blood. The trait is Ontology of Biological Attributes id OBA_2054046 (PDGFA/PLA2G4A 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 cytosolic phospholipase A2 (human) in blood.