A compound attribute that is the ratio of amount of butyrophilin subfamily 2 member A1 (human) in blood to amount of butyrophilin subfamily 3 member A2 (human) in blood. The trait is OBA_2053164 (BTN2A1/BTN3A2 protein level ratio in blood). Also known as: the ratio of amount of butyrophilin subfamily 2 member A1 (human) in blood to amount of butyrophilin subfamily 3 member A2 (human) in blood.