AXL/GAS6 protein level ratio in blood (OBA_2053537) can be described as follows. A compound attribute that is the ratio of amount of tyrosine-protein kinase receptor UFO (human) in blood to amount of growth arrest-specific protein 6 (human) in blood. Also known as: the ratio of amount of tyrosine-protein kinase receptor UFO (human) in blood to amount of growth arrest-specific protein 6 (human) in blood.