A compound attribute that is the ratio of amount of seizure 6-like protein (human) in blood to amount of seizure 6-like protein 2 (human) in blood. The trait is SEZ6L/SEZ6L2 protein level ratio in blood (OBA_2055639, an Ontology of Biological Attributes term). Also known as: the ratio of amount of seizure 6-like protein (human) in blood to amount of seizure 6-like protein 2 (human) in blood.