2WAA:
reference: The active site of a carbohydrate esterase displays divergent catalytic and noncatalytic binding functions., Montanier C, Money VA, Pires VM, Flint JE, Pinheiro BA, Goyal A, Prates JA, Izumi A, Stalbrand H, Morland C, Cartmell A, Kolenova K, Topakas E, Dodson EJ, Bolam DN, Davies GJ, Fontes CM, Gilbert HJ, PLoS Biol. 2009 Mar 31;7(3):e71. PMID: 19338387

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