Ontology of Biological Attributes term OBA_2055554 (CETN2/PRTFDC1 protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of centrin-2 (human) in blood to amount of phosphoribosyltransferase domain-containing protein 1 (human) in blood. Also known as: the ratio of amount of centrin-2 (human) in blood to amount of phosphoribosyltransferase domain-containing protein 1 (human) in blood.