2WVS:
reference: Analysis of the Reaction Coordinate of alpha-l-Fucosidases: A Combined Structural and Quantum Mechanical Approach., Lammerts van Bueren A, Fayers-Kerr J, Luo B, Zhang Y, Sollogoub M, Bleriot Y, Rovira C, Davies GJ, J Am Chem Soc. 2010 Jan 21. PMID: 20092273

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