MEPE/SOST protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2053801) can be described as follows. A compound attribute that is the ratio of amount of matrix extracellular phosphoglycoprotein (human) in blood to amount of sclerostin (human) in blood. Also known as: the ratio of amount of matrix extracellular phosphoglycoprotein (human) in blood to amount of sclerostin (human) in blood.