A compound attribute that is the ratio of amount of carbonic anhydrase 1 (human) in blood to amount of phosphopantothenoylcysteine decarboxylase (human) in blood. The trait is Ontology of Biological Attributes term OBA_2055732 (CA1/PPCDC protein level ratio in blood). Also known as: the ratio of amount of carbonic anhydrase 1 (human) in blood to amount of phosphopantothenoylcysteine decarboxylase (human) in blood.