Ontology of Biological Attributes entry OBA_2054735 (ERBB4/NELL1 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of receptor tyrosine-protein kinase erbB-4 (human) in blood to amount of protein kinase C-binding protein NELL1 (human) in blood. Also known as: the ratio of amount of receptor tyrosine-protein kinase erbB-4 (human) in blood to amount of protein kinase C-binding protein NELL1 (human) in blood.