Ontology of Biological Attributes identifier OBA_2053914 (APP/LAMA4 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of amyloid-beta precursor protein (human) in blood to amount of laminin subunit alpha-4 (human) in blood. Also known as: the ratio of amount of amyloid-beta precursor protein (human) in blood to amount of laminin subunit alpha-4 (human) in blood.