A compound attribute that is the ratio of amount of linker for activation of T-cells family member 2 (human) in blood to amount of syndecan-4 (human) in blood. The trait is LAT2/SDC4 protein level ratio in blood (Ontology of Biological Attributes identifier OBA_2054883). Also known as: the ratio of amount of linker for activation of T-cells family member 2 (human) in blood to amount of syndecan-4 (human) in blood.