CD40LG/GP6 protein level ratio in blood (OBA_2054211, an Ontology of Biological Attributes identifier) can be described as follows. A compound attribute that is the ratio of amount of CD40 ligand (human) in blood to amount of platelet glycoprotein VI (human) in blood. Also known as: the ratio of amount of CD40 ligand (human) in blood to amount of platelet glycoprotein VI (human) in blood.