AKT1S1/PRTFDC1 protein level ratio in blood (OBA_2054289, an Ontology of Biological Attributes term) can be described as follows. A compound attribute that is the ratio of amount of proline-rich AKT1 substrate 1 (human) in blood to amount of phosphoribosyltransferase domain-containing protein 1 (human) in blood. Also known as: the ratio of amount of proline-rich AKT1 substrate 1 (human) in blood to amount of phosphoribosyltransferase domain-containing protein 1 (human) in blood.