Ontology of Biological Attributes entry OBA_2055698 (SOST/SPP1 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of sclerostin (human) in blood to amount of osteopontin (human) in blood. Also known as: the ratio of amount of sclerostin (human) in blood to amount of osteopontin (human) in blood.