A compound attribute that is the ratio of amount of neural proliferation differentiation and control protein 1 (human) in blood to amount of chemokine-like protein TAFA-5 (human) in blood. The trait is NPDC1/TAFA5 protein level ratio in blood (OBA_2055188). Also known as: the ratio of amount of neural proliferation differentiation and control protein 1 (human) in blood to amount of chemokine-like protein TAFA-5 (human) in blood.