3MAM:
reference: Arg149 Is Involved in Switching the Low Affinity, Open State of the Binding Protein AfProX into Its High Affinity, Closed State., Tschapek B, Pittelkow M, Sohn-Bosser L, Holtmann G, Smits SH, Gohlke H, Bremer E, Schmitt L, J Mol Biol. 2011 Jun 2. PMID: 21664363

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