A compound attribute that is the ratio of amount of tumor necrosis factor receptor superfamily member 1A (human) in blood to amount of tumor necrosis factor receptor superfamily member 1B (human) in blood. The trait is TNFRSF1A/TNFRSF1B protein level ratio in blood (OBA_2052991). Also known as: the ratio of amount of tumor necrosis factor receptor superfamily member 1A (human) in blood to amount of tumor necrosis factor receptor superfamily member 1B (human) in blood.