A compound attribute that is the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of tyrosine-protein kinase Yes (human) in blood. The trait is Ontology of Biological Attributes identifier OBA_2053449 (GRAP2/YES1 protein level ratio in blood). Also known as: the ratio of amount of GRB2-related adapter protein 2 (human) in blood to amount of tyrosine-protein kinase Yes (human) in blood.