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The structures of ten different CS/DS disaccharides that exist in nature. CS/DS is made up of alternating uronic acid and N-acetylgalactosamine residues and can be sulfated at the 4- or 6-position of GalNAc and/or the 2-position of uronic acid. The general structure is shown accompanied by a table describing the composition differences among disaccharides, where R2, R4 and R6 are substituents that vary among the different disaccharides.
