NFASC/PLXNB2 protein level ratio in blood (Ontology of Biological Attributes entry OBA_2055125) can be described as follows. A compound attribute that is the ratio of amount of neurofascin (human) in blood to amount of plexin-B2 (human) in blood. Also known as: the ratio of amount of neurofascin (human) in blood to amount of plexin-B2 (human) in blood.