Abstract:
The electric dipole moments of the isolated amino acid tryptophan and small glycine-based peptides (WGn, n = 1-5, W = tryptophan, G = glycine) have been measured by deflection of a molecular beam in an inhomogeneous electric field. The measurements are compared to the results of ab initio calculations and Monte-Carlo simulations. The conformation and the flexibility of the peptides, at different temperatures, are discussed. The WGn peptides are much more floppy than an isolated tryptophan, even a single glycine is enough to make the peptide floppy on the timescale of the electric deflection measurements.
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Received 4 January 2002 Published online 13 September 2002
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Antoine, R., Compagnon, I., Rayane, D. et al. Electric dipole moments and conformations of isolated peptides. Eur. Phys. J. D 20, 583–587 (2002). https://doi.org/10.1140/epjd/e2002-00149-4
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DOI: https://doi.org/10.1140/epjd/e2002-00149-4