A compound attribute that is the ratio of amount of interleukin-2 receptor subunit alpha (human) in blood to amount of tumor necrosis factor receptor superfamily member 4 (human) in blood. The trait is OBA_2054432 (IL2RA/TNFRSF4 protein level ratio in blood). Also known as: the ratio of amount of interleukin-2 receptor subunit alpha (human) in blood to amount of tumor necrosis factor receptor superfamily member 4 (human) in blood.