6DXU:
reference: Active site flexibility revealed in crystal structures of Parabacteroides merdae beta-glucuronidase from the human gut microbiome., Little MS, Ervin SM, Walton WG, Tripathy A, Xu Y, Liu J, Redinbo MR, Protein Sci. 2018 Dec;27(12):2010-2022. doi: 10.1002/pro.3507. Epub 2018 Oct 27. PMID: 30230652

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