PMVK/PRTFDC1 protein level ratio in blood (OBA_2053531) can be described as follows. A compound attribute that is the ratio of amount of phosphomevalonate kinase (human) in blood to amount of phosphoribosyltransferase domain-containing protein 1 (human) in blood. Also known as: the ratio of amount of phosphomevalonate kinase (human) in blood to amount of phosphoribosyltransferase domain-containing protein 1 (human) in blood.