ANGPT1/APP protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054267) can be described as follows. A compound attribute that is the ratio of amount of angiopoietin-1 (human) in blood to amount of amyloid-beta precursor protein (human) in blood. Also known as: the ratio of amount of angiopoietin-1 (human) in blood to amount of amyloid-beta precursor protein (human) in blood.