A compound attribute that is the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of protein phosphatase inhibitor 2 (human) in blood. The trait is GRAP2/PPP1R2 protein level ratio in blood (OBA_2053443). Also known as: the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of protein phosphatase inhibitor 2 (human) in blood.