AK1/NSFL1C protein level ratio in blood (OBA_2053714, an Ontology of Biological Attributes term) can be described as follows. A compound attribute that is the ratio of amount of adenylate kinase isoenzyme 1 (human) in blood to amount of NSFL1 cofactor p47 (human) in blood. Also known as: the ratio of amount of adenylate kinase isoenzyme 1 (human) in blood to amount of NSFL1 cofactor p47 (human) in blood.