MANF/MESD protein level ratio in blood (OBA_2053812, an Ontology of Biological Attributes term) can be described as follows. A compound attribute that is the ratio of amount of mesencephalic astrocyte-derived neurotrophic factor (human) in blood to amount of LRP chaperone MESD (human) in blood. Also known as: the ratio of amount of mesencephalic astrocyte-derived neurotrophic factor (human) in blood to amount of LRP chaperone MESD (human) in blood.