Ontology of Biological Attributes id OBA_2053069 (HPCAL1/PLA2G4A protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of hippocalcin-like protein 1 (human) in blood to amount of cytosolic phospholipase A2 (human) in blood. Also known as: the ratio of amount of hippocalcin-like protein 1 (human) in blood to amount of cytosolic phospholipase A2 (human) in blood.