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Figure 2. Structure, composition, and branches are labeled for oligosaccharides of G2FS2. The glycan has three terminal carbohydrates: FUC-2, and two N-acetyl neuraminic acids or sialylic acids, labeled S. Desialylating G2FS2 produces G2F. Alternate glycan compositions and structures are shown using a simplified notation. Note that MN2, not shown, can be formed by removing MAN5 and MAN8 from M3N2.
