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. Author manuscript; available in PMC: 2015 Jun 10.
Published in final edited form as: Angew Chem Int Ed Engl. 2014 Apr 30;53(24):6080–6084. doi: 10.1002/anie.201402011

Figure 3.

Figure 3

Offset FTIR spectra in the ester C=O stretching region of DM-P, MA, EM-P, and MP in different solvents, as indicated. The peptide concentrations were 2 mM and, in each case, the spectrum of the model compound has been normalized with respect to that of the corresponding peptide.