①Measured by its binding ability in a functional ELISA. Immobilized TNF-α at 5 μg/ml can bind human TNFR1, the EC50 is 7.799-10.90 ng/ml.②Measured by its binding ability in a functional ELISA. Immobilized LTA at 5 μg/ml can bind human TNFR1, the EC50 is 4.409-6.797 ng/ml.