CA2/PSMG3 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054813) can be described as follows. A compound attribute that is the ratio of amount of carbonic anhydrase 2 (human) in blood to amount of proteasome assembly chaperone 3 (human) in blood. Also known as: the ratio of amount of carbonic anhydrase 2 (human) in blood to amount of proteasome assembly chaperone 3 (human) in blood.