A compound attribute that is the ratio of amount of tumor necrosis factor receptor superfamily member 19L (human) in blood to amount of tumor necrosis factor receptor superfamily member 1A (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2053234 (RELT/TNFRSF1A protein level ratio in blood). Also known as: the ratio of amount of tumor necrosis factor receptor superfamily member 19L (human) in blood to amount of tumor necrosis factor receptor superfamily member 1A (human) in blood.