A compound attribute that is the ratio of amount of tyrosine-protein kinase receptor UFO (human) in blood to amount of cell surface glycoprotein MUC18 (human) in blood. The trait is AXL/MCAM protein level ratio in blood (OBA_2053539). Also known as: the ratio of amount of tyrosine-protein kinase receptor UFO (human) in blood to amount of cell surface glycoprotein MUC18 (human) in blood.