IGFBP6/TNFRSF4 protein level ratio in blood (OBA_2054359) 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 tumor necrosis factor receptor superfamily member 4 (human) in blood. Also known as: the ratio of amount of insulin-like growth factor-binding protein 6 (human) in blood to amount of tumor necrosis factor receptor superfamily member 4 (human) in blood.