1GW1:
reference: Substrate distortion by a beta-mannanase: snapshots of the Michaelis and covalent-intermediate complexes suggest a B(2,5) conformation for the transition state., Ducros VM, Zechel DL, Murshudov GN, Gilbert HJ, Szabo L, Stoll D, Withers SG, Davies GJ, Angew Chem Int Ed Engl 2002 Aug 2;41(15):2824-7. PMID: 12203498

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