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. 2007;5(8):583–597. doi: 10.1038/nrmicro1707

Figure 2. Structures of different N-glycan types.

Figure 2

Examples of the structural composition of high-mannose-type N-glycans. a | Tri-antennary complex-type N-glycans. b | Hybrid-type N-glycans. c | High-mannose-type N-glycans that are abundantly present on the envelope glycoprotein gp120 of HIV, but are rare on mammalian glycoproteins. Besides high-mannose-type N-glycans, the complex-type and hybrid-type N-glycans are also present on gp120. Asn, asparagine; Fuc, fucose; Gal, Galactose; GlcNAc, N-acetylglucosamine; Man, mannose; SA, sialic acid; Ser, serine; Thr, threonine; X, any amino acid except proline.