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Peptide side-chain impact upon (A-C) nanotubes β-sheet lamination and (D) ability to display metal ions in fibers. (A) Two laminated β-sheets of KLVFFAE displaying F-F interactions[28], (B) HHQALVFFA displaying His-Zn-His side chain interaction between two laminated β-sheets[34] (C) ccQALVFFA displaying cytosine i-motif interaction between two laminated β-sheets[55] (D) HAQKLVFFA His-Cu-His interaction between hydrogen bonded β-strands[54].
