A compound attribute that is the ratio of amount of agrin (human) in blood to amount of basement membrane-specific heparan sulfate proteoglycan core protein (human) in blood. The trait is AGRN/HSPG2 protein level ratio in blood (OBA_2053641). Also known as: the ratio of amount of agrin (human) in blood to amount of basement membrane-specific heparan sulfate proteoglycan core protein (human) in blood.