A compound attribute that is the ratio of amount of mitochondrial fission 1 protein (human) in blood to amount of platelet-derived growth factor subunit B (human) in blood. The trait is Ontology of Biological Attributes term OBA_2055406 (FIS1/PDGFB protein level ratio in blood). Also known as: the ratio of amount of mitochondrial fission 1 protein (human) in blood to amount of platelet-derived growth factor subunit B (human) in blood.