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(A) Electropherogram of unsaturated disaccharides ΔHexAFrc-GalNAc from the polysaccharide K4 (K4) and ΔHexA-GalNAc of defructosylated K4 product (K4d) (reprinted with permission from ref. [114]). (B) Electropherogram of the polysaccharide K4 (K4) and of the defructosylated K4 polysaccharide (K4d) (reprinted with permission from ref. [115]).
