OBA_2053303 (BMP6/SPINT2 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of bone morphogenetic protein 6 (human) in blood to amount of Kunitz-type protease inhibitor 2 (human) in blood. Also known as: the ratio of amount of bone morphogenetic protein 6 (human) in blood to amount of Kunitz-type protease inhibitor 2 (human) in blood.