EREG/GYS1 protein level ratio in blood (OBA_2054745) can be described as follows. A compound attribute that is the ratio of amount of proepiregulin (human) in blood to amount of glycogen [starch] synthase, muscle (human) in blood. Also known as: the ratio of amount of proepiregulin (human) in blood to amount of glycogen [starch] synthase, muscle (human) in blood.