RRM2B/SUGT1 protein level ratio in blood (OBA_2053156, an Ontology of Biological Attributes id) can be described as follows. A compound attribute that is the ratio of amount of ribonucleoside-diphosphate reductase subunit M2 B (human) in blood to amount of protein SGT1 homolog (human) in blood. Also known as: the ratio of amount of ribonucleoside-diphosphate reductase subunit M2 B (human) in blood to amount of protein SGT1 homolog (human) in blood.