A compound attribute that is the ratio of amount of receptor-binding cancer antigen expressed on SiSo cells (human) in blood to amount of tubulin-specific chaperone C (human) in blood. The trait is OBA_2053183 (EBAG9/TBCC protein level ratio in blood). Also known as: the ratio of amount of receptor-binding cancer antigen expressed on SiSo cells (human) in blood to amount of tubulin-specific chaperone C (human) in blood.