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Proposed targets of wcjE-mediated O-acetylation. The reported structures of serotypes 11A, 9V, and 35 capsule PS repeat units (13, 26) are shown. Inter-subunit glycosidic linkages are represented by dotted lines. Arrows point to O-acetate substitutions proposed to be mediated by wcjE in each serotype (see text). Ac, acetate.
