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Schematic representation of glycan structures from isolates from GBS patients and the cst-II KO mutant. (A) GB11 and GB2, containing terminal α2,3-linked sialic acid and the corresponding ganglioside GD1a mimic. (B) GB16 and GB19, containing terminal α2,8-linked sialic acid and the corresponding ganglioside GD1c mimic. (C) Cst-II KO, GB2 Cst-II KO, and GB19 neuraminidase, lacking sialic acid.
