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(A) FTIR spectra of Aβ16-22-DMK* fibrils (in the amide I′ region) measured in solution and in the form of dry film, as indicated. For easy comparison, the spectrum obtained with dry film has been scaled by a factor of 0.25. (B) Fitting of the ester C=O stretching vibrational bands in (A) with one (solution) and two (dry film) Gaussians.
