A compound attribute that is the ratio of amount of platelet-derived growth factor subunit B (human) in blood to amount of UDP-glucuronic acid decarboxylase 1 (human) in blood. The trait is Ontology of Biological Attributes id OBA_2053990 (PDGFB/UXS1 protein level ratio in blood). Also known as: the ratio of amount of platelet-derived growth factor subunit B (human) in blood to amount of UDP-glucuronic acid decarboxylase 1 (human) in blood.