A compound attribute that is the ratio of amount of proheparin-binding EGF-like growth factor (human) in blood to amount of linker for activation of T-cells family member 2 (human) in blood. The trait is HBEGF/LAT2 protein level ratio in blood (OBA_2053090). Also known as: the ratio of amount of proheparin-binding EGF-like growth factor (human) in blood to amount of linker for activation of T-cells family member 2 (human) in blood.