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1H NMR spectra of Aβ peptide and His-Ala mutants (bottom black lines) and of Aβ peptide and His-Ala mutants in the presence of 0.9 equiv of Zn(II) (top red lines) in selected regions (panel A: aromatic, panel B: Hβ and Hγ). [peptide] = 300 μM, [Zn(II)] = 270 μM in d11-TRIS buffer 50 mM, pH = 7.4, T = 318 K, v = 500 MHz.
