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ADCC activity of x-huCD20 antibody on WIL2-S target cells using NK cell line as effector cells. Antibody concentration curves shown for x-huCD20.IgG1-CHO (diamonds), x-huCD20.IgG4-CHO (circles), and x-huCD20.IgG4-Fut8KO (squares). The results shown are the values of duplicate wells from one representative plate of an ADCC assay with the lines representing the result of a 4 parameter fit.
