MANF/SNX9 protein level ratio in blood (Ontology of Biological Attributes term OBA_2053824) 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 sorting nexin-9 (human) in blood. Also known as: the ratio of amount of mesencephalic astrocyte-derived neurotrophic factor (human) in blood to amount of sorting nexin-9 (human) in blood.