CA2/NSFL1C protein level ratio in blood (OBA_2055738, an Ontology of Biological Attributes entry) can be described as follows. A compound attribute that is the ratio of amount of carbonic anhydrase 2 (human) in blood to amount of NSFL1 cofactor p47 (human) in blood. Also known as: the ratio of amount of carbonic anhydrase 2 (human) in blood to amount of NSFL1 cofactor p47 (human) in blood.