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. Author manuscript; available in PMC: 2019 Aug 9.
Published in final edited form as: ACS Biomater Sci Eng. 2018 Dec 20;5(2):977–985. doi: 10.1021/acsbiomaterials.8b01348

Figure 2.

Figure 2.

Secondary structure characterization of On(SL)6On series. (a) Normalized ATR-FTIR spectra of the amide I and amide II region of dried peptide samples. All peptides have characteristic peaks for antiparallel β-sheet structure: amide Ia between 1620–1630 cm−1 and amide Ib at 1695 cm−1. (b) Circular dichroism (CD) spectra of 1 wt % peptide solutions in 2,2,2-trifluoroethanol (TFE) at 25 °C.