Ontology of Biological Attributes id OBA_2054871 (L1CAM/SEZ6L protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of neural cell adhesion molecule L1 (human) in blood to amount of seizure 6-like protein (human) in blood. Also known as: the ratio of amount of neural cell adhesion molecule L1 (human) in blood to amount of seizure 6-like protein (human) in blood.