6B9O:
reference: Structural Basis of Outstanding Multivalent Effects in Jack Bean alpha-Mannosidase Inhibition., Howard E, Cousido-Siah A, Lepage ML, Schneider JP, Bodlenner A, Mitschler A, Meli A, Izzo I, Alvarez HA, Podjarny A, Compain P, Angew Chem Int Ed Engl. 2018 Jul 2;57(27):8002-8006. doi: 10.1002/anie.201801202., Epub 2018 Jun 6. PMID: 29722924

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