Ontology of Biological Attributes id OBA_2055185 (CXCL11/CXCL13 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of C-X-C motif chemokine 11 (human) in blood to amount of C-X-C motif chemokine 13 (human) in blood. Also known as: the ratio of amount of C-X-C motif chemokine 11 (human) in blood to amount of C-X-C motif chemokine 13 (human) in blood.