PDGFB/SNAP29 protein level ratio in blood (OBA_2054058, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of platelet-derived growth factor subunit B (human) in blood to amount of synaptosomal-associated protein 29 (human) in blood. Also known as: the ratio of amount of platelet-derived growth factor subunit B (human) in blood to amount of synaptosomal-associated protein 29 (human) in blood.