A compound attribute that is the ratio of amount of Fc receptor-like protein 2 (human) in blood to amount of T-lymphocyte surface antigen Ly-9 (human) in blood. The trait is OBA_2055299 (FCRL2/LY9 protein level ratio in blood). Also known as: the ratio of amount of Fc receptor-like protein 2 (human) in blood to amount of T-lymphocyte surface antigen Ly-9 (human) in blood.