HYOU1/PTPRF protein level ratio in blood (OBA_2052972) can be described as follows. A compound attribute that is the ratio of amount of hypoxia up-regulated protein 1 (human) in blood to amount of receptor-type tyrosine-protein phosphatase F (human) in blood. Also known as: the ratio of amount of hypoxia up-regulated protein 1 (human) in blood to amount of receptor-type tyrosine-protein phosphatase F (human) in blood.