A compound attribute that is the ratio of amount of receptor tyrosine-protein kinase erbB-2 (human) in blood to amount of furin (human) in blood. The trait is ERBB2/FURIN protein level ratio in blood (OBA_2054730). Also known as: the ratio of amount of receptor tyrosine-protein kinase erbB-2 (human) in blood to amount of furin (human) in blood.