Ontology of Biological Attributes identifier OBA_2052985 (TNFRSF13B/TNFRSF13C protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of tumor necrosis factor receptor superfamily member 13B (human) in blood to amount of tumor necrosis factor receptor superfamily member 13C (human) in blood. Also known as: the ratio of amount of tumor necrosis factor receptor superfamily member 13B (human) in blood to amount of tumor necrosis factor receptor superfamily member 13C (human) in blood.