Ontology of Biological Attributes entry OBA_2055727 (CA13/USP8 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of carbonic anhydrase 13 (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood. Also known as: the ratio of amount of carbonic anhydrase 13 (human) in blood to amount of ubiquitin carboxyl-terminal hydrolase 8 (human) in blood.