①Measured by its binding ability in a functional ELISA. Immobilized LTA at 5 μg/ml can bind human TNFRSF1B , the EC50 is 1.632-2.699 ng/ml.②Measured by its binding ability in a functional ELISA. Immobilized LTA at 5 μg/ml can bind human TNFR1, the EC50 of human LTA protein is 4.409-6.797 ng/ml.