A compound attribute that is the ratio of amount of receptor tyrosine-protein kinase erbB-3 (human) in blood to amount of interleukin-1 receptor type 2 (human) in blood. The trait is Ontology of Biological Attributes term OBA_2054733 (ERBB3/IL1R2 protein level ratio in blood). Also known as: the ratio of amount of receptor tyrosine-protein kinase erbB-3 (human) in blood to amount of interleukin-1 receptor type 2 (human) in blood.