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. Author manuscript; available in PMC: 2010 Sep 10.
Published in final edited form as: J Phys Chem B. 2009 Sep 10;113(36):12169–12180. doi: 10.1021/jp904153z

Figure 1.

Figure 1

Correlation between the direction of the amide I transition dipole moment in one peptide unit and the molecular axis of an α-helix. The first peptide unit in Pauling’s α-helix is also illustrated.