APEX1/FUS protein level ratio in blood (OBA_2054386, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of DNA repair nuclease/redox regulator APEX1 (human) in blood to amount of RNA-binding protein FUS (human) in blood. Also known as: the ratio of amount of DNA repair nuclease/redox regulator APEX1 (human) in blood to amount of RNA-binding protein FUS (human) in blood.