①Measured by its binding ability in a functional ELISA. Immobilized TNFSF13B at 10 μg/ml can bind human BCMA , the EC50 of human TNFSF13B protein is 221.3-298.6 ng/ml.②Human SIRPA protein His/Myc tag captured on COOH chip can bind Human CD47 protein Fc tag with an affinity constant of 19.1 nM as detected by LSPR Assay.③Measured by its binding ability in a functional ELISA. Immobilized TNFSF13B at 2 μg/ml can bind TNFRSF13C, the EC50 is 9.943-15.72 ng/ml.