2EDA:
reference: Crystallographic and fluorescence studies of the interaction of haloalkane dehalogenase with halide ions. Studies with halide compounds reveal a halide binding site in the active site., Verschueren KH, Kingma J, Rozeboom HJ, Kalk KH, Janssen DB, Dijkstra BW, Biochemistry 1993 Sep 7;32(35):9031-7. PMID: 8369276

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