Ontology of Biological Attributes identifier OBA_2054357 (IGFBP6/PTGDS protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of insulin-like growth factor-binding protein 6 (human) in blood to amount of prostaglandin-H2 D-isomerase (human) in blood. Also known as: the ratio of amount of insulin-like growth factor-binding protein 6 (human) in blood to amount of prostaglandin-H2 D-isomerase (human) in blood.