4BWN:
reference: DARPin-assisted crystallography of the CC2-LZ domain of NEMO reveals a coupling between dimerization and ubiquitin binding., Grubisha O, Kaminska M, Duquerroy S, Fontan E, Cordier F, Haouz A, Raynal B, Chiaravalli J, Delepierre M, Israel A, Veron M, Agou F, J Mol Biol. 2010 Jan 8;395(1):89-104. Epub 2009 Oct 23. PMID: 19854204

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