A compound attribute that is the ratio of amount of basigin (human) in blood to amount of T-lymphocyte surface antigen Ly-9 (human) in blood. The trait is OBA_2053308 (BSG/LY9 protein level ratio in blood). Also known as: the ratio of amount of basigin (human) in blood to amount of T-lymphocyte surface antigen Ly-9 (human) in blood.