Skip to main content
. Author manuscript; available in PMC: 2009 Sep 25.
Published in final edited form as: Biochemistry. 2009 Feb 24;48(7):1604–1612. doi: 10.1021/bi801888j

Figure 7. Changes in secondary structure of PE in the presence of TFE as illustrated by CD analyses.

Figure 7

a. CD spectra of PE in the presence of TFE (trifluorethanol). CD spectra for PE were obtained under different concentrations of the trifluoroethanol (TFE), an organic solvent. TFE of 0% to 33% was found to alter the CD spectra of PE, indicating alterations in secondary structure.

b. Increase in alpha-helical structure of PE in the presence of TFE. The relative extent (percent) of changes in secondary structural features with increasing concentrations of TFE (0 to 33%) are illustrated for alpha-helix (■), beta-sheet (○), and beta-turn (△) features. TFE substantially increases the alpha-helical secondary structure of PE.