1XKE:
reference: Solution structure of the Ran-binding domain 2 of RanBP2 and its interaction with the C terminus of Ran., Geyer JP, Doker R, Kremer W, Zhao X, Kuhlmann J, Kalbitzer HR, J Mol Biol. 2005 May 6;348(3):711-25. PMID: 15826666

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