Figure 1: IgG1 with heavy chains in blue, light chains in purple and glycans, attached to Asn-297 of both Fc chains, in red.
From: IgG1 Fc N-glycan galactosylation as a biomarker for immune activation

Examples of IgG Fc N-glycan structures are shown on the right. They can differ by additions of galactose (G), fucose (F), bisecting N-acetylglucosamine (GlcNAc, N) and/or sialic acid (S). The left figure was adapted from Arnold et al.3 and reproduced with permission of Prof. Dwek and Annual Reviews in the format Republish in a journal/magazine via Copyright Clearance Center. Glycan structures were drawn with GlycoWorkbench44.