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Structure of a fully processed IgG-Fc N-glycan. The Asparagine 297-linked complex-type glycan is located within the CH2 domains of the Fc fragment and consists of a complex, biantennary structure. In vivo, such a fully processed glycan will be found only in trace amounts as the majority of antibodies will carry either no, one or two galactose residues and a fraction of those carrying galactose will additionally possess sialic acid
