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Inhibition of IgM and dIgA2 binding by SC. The binding of IgM (upper panel, ×10 magnification) and dIgA2 (lower panel, ×40 magnification) to hFcα/μR transiently expressed on COS-7 cells could be blocked with saturating levels of free SC. Fcα/μR expression and IgM or dIgA2 binding were detected as in Fig. 1.
