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  • Title: [Measurement of affinity constant of monoclonal antibody by competitive antibody binding to antigen].
    Author: Guo JB, Guo R, Liu YH.
    Journal: Nan Fang Yi Ke Da Xue Xue Bao; 2006 Jul; 26(7):1057-9. PubMed ID: 16864113.
    Abstract:
    OBJECTIVE: To develop a more reliable and stable method for determining monoclonal antibody (mAb) affinity constant based on competitive antibody/antigen binding. METHODS: The Kd value was calculated based on the relationship between the binding proportion of the antigen and the original concentration of the mAb that competed for the binding site of the antigen. RESULTS: The Kd values measured with this improved method under two different conditions were 2.61x10(-12) mol/L and 2.39x10(-12) mol/L, and those with Friguent method in these two conditions were 5.57x10(-10) mol/L and 1.41x10(-10) mol/L, respectively. CONCLUSION: Compared with Friguent method, the Kd values measured with this improved method are closer to the actual value, and the measurement results under different experiment conditions are more stable.
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