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(a) Structural comparison between high-mannose glycan (PDB code; 2wah, green) and complex-type glycan (PDB code; 2dts, cyan). (b) Structural superposition between high-mannose type Fc fragment (green) and complex-type Fc fragment (cyan). Protein molecules and carbohydrate chains are shown in wire and stick models, respectively. The positions of Asn297 are indicated by red asterisks. Structural superposition of crystal structures were performed by the program SUPERPOSE [56].
