Ontology of Biological Attributes identifier OBA_2053174 (BTN2A1/SPINT2 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of butyrophilin subfamily 2 member A1 (human) in blood to amount of Kunitz-type protease inhibitor 2 (human) in blood. Also known as: the ratio of amount of butyrophilin subfamily 2 member A1 (human) in blood to amount of Kunitz-type protease inhibitor 2 (human) in blood.