MAP2K6/PRTFDC1 protein level ratio in blood (OBA_2053832) can be described as follows. A compound attribute that is the ratio of amount of dual specificity mitogen-activated protein kinase kinase 6 (human) in blood to amount of phosphoribosyltransferase domain-containing protein 1 (human) in blood. Also known as: the ratio of amount of dual specificity mitogen-activated protein kinase kinase 6 (human) in blood to amount of phosphoribosyltransferase domain-containing protein 1 (human) in blood.