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Negative ion MALDI-TOF analysis of acidic N-glycans released from rIgAs produced in murine myeloma cell line Sp2/0. the likely glycan structures are shown as a schematic and the mass of the glycans is expressed as m/z. (A) IgA1, (B) IgA2m1, (C) IgA2m2, (D) IgA2n.
