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Characterization of cytokine production and its modulation induced by inhibitory receptor cross-linking. B lymphocytes were stimulated with CD40L-transfected cells plus IL-4 (A) or with LPS plus IL-4 (B) in the presence (+) of the indicated cross-linked MAbs. The mean fluorescence intensity after 2 days of stimulation is reported. α-CD152, anti-CD152 antibody.
