JAM2/TNFRSF19 protein level ratio in blood (OBA_2055495) can be described as follows. A compound attribute that is the ratio of amount of junctional adhesion molecule B (human) in blood to amount of tumor necrosis factor receptor superfamily member 19 (human) in blood. Also known as: the ratio of amount of junctional adhesion molecule B (human) in blood to amount of tumor necrosis factor receptor superfamily member 19 (human) in blood.