A compound attribute that is the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of endoribonuclease LACTB2 (human) in blood. The trait is GRAP2/LACTB2 protein level ratio in blood (OBA_2053438). Also known as: the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of endoribonuclease LACTB2 (human) in blood.