2ZZR:
reference: Substrate specificity of streptococcal unsaturated glucuronyl hydrolases for sulfated glycosaminoglycan., Maruyama Y, Nakamichi Y, Itoh T, Mikami B, Hashimoto W, Murata K, J Biol Chem. 2009 Jul 3;284(27):18059-69. doi: 10.1074/jbc.M109.005660. Epub 2009, May 5. PMID: 19416976

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