A compound attribute that is the ratio of amount of integrin beta-1 (human) in blood to amount of cell surface glycoprotein MUC18 (human) in blood. The trait is OBA_2055480 (ITGB1/MCAM protein level ratio in blood). Also known as: the ratio of amount of integrin beta-1 (human) in blood to amount of cell surface glycoprotein MUC18 (human) in blood.