A compound attribute that is the ratio of amount of contactin-3 (human) in blood to amount of fetuin-B (human) in blood. The trait is Ontology of Biological Attributes entry OBA_2053863 (CNTN3/FETUB protein level ratio in blood). Also known as: the ratio of amount of contactin-3 (human) in blood to amount of fetuin-B (human) in blood.