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. 2017 Mar 22;7:307. doi: 10.1038/s41598-017-00332-3

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© The Author(s) 2017

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Three-dimensional model of the assembly formed by the peptide moiety of 2Nal₂/Gd-2Nal₂. In panel (a) the cross β-structure of a single β-sheet is reported. In the inset the extensive hydrophobic interactions established by Nal side chains are highlighted. The possible direct interactions between two facing β-sheets is reported in panel (b).