①Measured by its binding ability in a functional ELISA. Immobilized KLRK1 at 10 μg/ml can bind human ULBP1, the EC50 of human ULBP1 protein is 228.5-427.6 ng/ml.
②Human KLRK1 protein Fc tag captured on COOH chip can bind Human ULBP1 protein Fc/myc tag with an affinity constant of 2.27 nM as detected by LSPR Assay.