COL6A3/NBL1 protein level ratio in blood (Ontology of Biological Attributes id OBA_2053803) 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 neuroblastoma suppressor of tumorigenicity 1 (human) in blood. Also known as: the ratio of amount of collagen alpha-3(VI) chain (human) in blood to amount of neuroblastoma suppressor of tumorigenicity 1 (human) in blood.