A compound attribute that is the ratio of amount of baculoviral IAP repeat-containing protein 2 (human) in blood to amount of CD40 ligand (human) in blood. The trait is BIRC2/CD40LG protein level ratio in blood (OBA_2053291, an Ontology of Biological Attributes id). Also known as: the ratio of amount of baculoviral IAP repeat-containing protein 2 (human) in blood to amount of CD40 ligand (human) in blood.