A compound attribute that is the ratio of amount of carbonic anhydrase 5A, mitochondrial (human) in blood to amount of glutathione S-transferase A1 (human) in blood. The trait is CA5A/GSTA1 protein level ratio in blood (Ontology of Biological Attributes id OBA_2054823). Also known as: the ratio of amount of carbonic anhydrase 5A, mitochondrial (human) in blood to amount of glutathione S-transferase A1 (human) in blood.