Ontology of Biological Attributes id OBA_2053296 (BLVRB/CA2 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of flavin reductase (NADPH) (human) in blood to amount of carbonic anhydrase 2 (human) in blood. Also known as: the ratio of amount of flavin reductase (NADPH) (human) in blood to amount of carbonic anhydrase 2 (human) in blood.