EBAG9/TGFB1 protein level ratio in blood (OBA_2055614) can be described as follows. A compound attribute that is the ratio of amount of receptor-binding cancer antigen expressed on SiSo cells (human) in blood to amount of transforming growth factor beta-1 (human) in blood. Also known as: the ratio of amount of receptor-binding cancer antigen expressed on SiSo cells (human) in blood to amount of transforming growth factor beta-1 (human) in blood.