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Structures of the repeat units of the CPSs of S. pneumoniae types 4 (34), 6B (74), 8 (35), and 18C (47, 58). Glc, glucose; Gal, galactose; Rha, rhamnose; GlcA, glucuronic acid; GalNAc, 2-acetamido-2-deoxy-d-galactose; ManNAc, 2-acetamido-2-deoxymanose; FucNAc, 2-acetamido-2,6-deoxygalactose; RibOH, ribitol.
