Phenylalanine (Phe, 4) is a naturally occurring amino acid. What is the energy of interaction between its phenyl group and the electric dipole moment of a neighbouring peptide group? Take the distance between the groups as 4.0nm and treat the phenyl group as a benzene molecule. The dipole moment of the peptide group is μ =2.7 D and the polarizability volume of benzene is α′=1.04×10⁻²⁹m³.

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OH H₂N 4 Phenylalanine