Ontology of Biological Attributes id OBA_2054381 (IPCEF1/SPARC protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of interactor protein for cytohesin exchange factors 1 (human) in blood to amount of SPARC protein (human) in blood. Also known as: the ratio of amount of interactor protein for cytohesin exchange factors 1 (human) in blood to amount of SPARC protein (human) in blood.