4N2X:
reference: Binding modes of DL-2-haloacid dehalogenase revealed by crystallography, modeling and isotope effects studies., Siwek A, Omi R, Hirotsu K, Jitsumori K, Esaki N, Kurihara T, Paneth P, Arch Biochem Biophys. 2013 Sep 23;540(1-2):26-32. doi: 10.1016/j.abb.2013.09.012. PMID: 24071515

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