OBA_2053448 (GRAP2/TYMP protein level ratio in blood) can be described as follows. A compound attribute that is the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of thymidine phosphorylase (human) in blood. Also known as: the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of thymidine phosphorylase (human) in blood.