Ontology of Biological Attributes identifier OBA_2054709 (CCL5/CD40LG protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of C-C motif chemokine 5 (human) in blood to amount of CD40 ligand (human) in blood. Also known as: the ratio of amount of C-C motif chemokine 5 (human) in blood to amount of CD40 ligand (human) in blood.