A compound attribute that is the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of mitogen-activated protein kinase kinase kinase kinase 5 (human) in blood. The trait is OBA_2053440 (GRAP2/MAP4K5 protein level ratio in blood). Also known as: the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of mitogen-activated protein kinase kinase kinase kinase 5 (human) in blood.