A compound attribute that is the ratio of amount of butyrophilin subfamily 2 member A1 (human) in blood to amount of interleukin-10 receptor subunit beta (human) in blood. The trait is BTN2A1/IL10RB protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2053168). Also known as: the ratio of amount of butyrophilin subfamily 2 member A1 (human) in blood to amount of interleukin-10 receptor subunit beta (human) in blood.