GP6/MANF protein level ratio in blood (Ontology of Biological Attributes id OBA_2053423) can be described as follows. A compound attribute that is the ratio of amount of platelet glycoprotein VI (human) in blood to amount of mesencephalic astrocyte-derived neurotrophic factor (human) in blood. Also known as: the ratio of amount of platelet glycoprotein VI (human) in blood to amount of mesencephalic astrocyte-derived neurotrophic factor (human) in blood.