FCRL1/TNFRSF13C protein level ratio in blood (OBA_2055218) can be described as follows. A compound attribute that is the ratio of amount of Fc receptor-like protein 1 (human) in blood to amount of tumor necrosis factor receptor superfamily member 13C (human) in blood. Also known as: the ratio of amount of Fc receptor-like protein 1 (human) in blood to amount of tumor necrosis factor receptor superfamily member 13C (human) in blood.