A compound attribute that is the ratio of amount of DNA repair nuclease/redox regulator APEX1 (human) in blood to amount of protein dpy-30 homolog (human) in blood. The trait is APEX1/DPY30 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054334). Also known as: the ratio of amount of DNA repair nuclease/redox regulator APEX1 (human) in blood to amount of protein dpy-30 homolog (human) in blood.