Ontology of Biological Attributes id OBA_2054772 (CASP3/PDGFA protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of caspase-3 (human) in blood to amount of platelet-derived growth factor subunit A (human) in blood. Also known as: the ratio of amount of caspase-3 (human) in blood to amount of platelet-derived growth factor subunit A (human) in blood.