A compound attribute that is the ratio of amount of DNA repair nuclease/redox regulator APEX1 (human) in blood to amount of methionine aminopeptidase 2 (human) in blood. The trait is APEX1/METAP2 protein level ratio in blood (Ontology of Biological Attributes id OBA_2055169). Also known as: the ratio of amount of DNA repair nuclease/redox regulator APEX1 (human) in blood to amount of methionine aminopeptidase 2 (human) in blood.