2XU4:
reference: Systematic investigation of halogen bonding in protein-ligand interactions., Hardegger LA, Kuhn B, Spinnler B, Anselm L, Ecabert R, Stihle M, Gsell B, Thoma R, Diez J, Benz J, Plancher JM, Hartmann G, Banner DW, Haap W, Diederich F, Angew Chem Int Ed Engl. 2011 Jan 3;50(1):314-8. PMID: 21184410

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