3IOZ:
reference: Pseudo-merohedral twinning and noncrystallographic symmetry in orthorhombic crystals of SIVmac239 Nef core domain bound to different-length TCRzeta fragments., Kim WM, Sigalov AB, Stern LJ, Acta Crystallogr D Biol Crystallogr. 2010 Feb;66(Pt 2):163-75. Epub 2010 Jan 22. PMID: 20124696

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