Ontology of Biological Attributes id OBA_2054482 (CST3/TIMP1 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of cystatin-C (human) in blood to amount of metalloproteinase inhibitor 1 (human) in blood. Also known as: the ratio of amount of cystatin-C (human) in blood to amount of metalloproteinase inhibitor 1 (human) in blood.