3M3J:
reference: A new crystal form of Lys48-linked diubiquitin., Trempe JF, Brown NR, Noble ME, Endicott JA, Acta Crystallogr Sect F Struct Biol Cryst Commun. 2010 Sep 1;66(Pt, 9):994-8. Epub 2010 Aug 21. PMID: 20823512

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