A compound attribute that is the ratio of amount of B-cell antigen receptor complex-associated protein beta chain (human) in blood to amount of Fc receptor-like protein 1 (human) in blood. The trait is CD79B/FCRL1 protein level ratio in blood (OBA_2053370, an Ontology of Biological Attributes identifier). Also known as: the ratio of amount of B-cell antigen receptor complex-associated protein beta chain (human) in blood to amount of Fc receptor-like protein 1 (human) in blood.