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Far-UV CD spectra plotting the mean residue ellipticity against wavelength for (A) the poly-l-asparagine peptide D2N15K2 and (B) the yeast prion protein Sup35 peptide. The spectra are typical of pure β-sheet at pH 2 but suggest a decrease of β-sheet with increasing pH to neutral pH. The signal for the yeast prion protein Sup35 peptide eventually becomes that of a random coil at the highest pH of 10.4.
