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. 2021 Apr 27;9(5):432. doi: 10.3390/vaccines9050432

Figure 1.

Figure 1

Primary line structures (differences between serotypes shown in bold) and schematic diagrams of the O-antigen repeating units of S. flexneri modelled in this work: (a) serotype Y (Sf Y), (b) non-biological serotype 6n (Sf 6n) with Gal instead of GalA, (c) serotype 6 (Sf 6), (d) serotype 6 with 100% O-acetylation at O3 of RhaIII (Sf 6-3Ac), and (e) serotype 6 with 100% O-acetylation at O4 of RhaIII (Sf 6-4Ac). Diagrams use the Symbol Nomenclature for Glycans (SNFG) [12,13] with green triangle for Rha, blue square for GlcNAc, blue circle for Glc, yellow circle for Gal, yellow half diamond for GalA, yellow square for GalNAc, and red triangle for O-acetyl.