A compound attribute that is the ratio of amount of mesencephalic astrocyte-derived neurotrophic factor (human) in blood to amount of cytosolic phospholipase A2 (human) in blood. The trait is MANF/PLA2G4A protein level ratio in blood (OBA_2053818). Also known as: the ratio of amount of mesencephalic astrocyte-derived neurotrophic factor (human) in blood to amount of cytosolic phospholipase A2 (human) in blood.