A compound attribute that is the ratio of amount of membrane cofactor protein (human) in blood to amount of tumor necrosis factor receptor superfamily member 14 (human) in blood. The trait is CD46/TNFRSF14 protein level ratio in blood (OBA_2054227). Also known as: the ratio of amount of membrane cofactor protein (human) in blood to amount of tumor necrosis factor receptor superfamily member 14 (human) in blood.