Ontology of Biological Attributes id OBA_2053807 (COL6A3/TAFA5 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of collagen alpha-3(VI) chain (human) in blood to amount of chemokine-like protein TAFA-5 (human) in blood. Also known as: the ratio of amount of collagen alpha-3(VI) chain (human) in blood to amount of chemokine-like protein TAFA-5 (human) in blood.