Infrared fingerprint spectroscopy and theoretical studies of potassium ion tagged amino acids and peptides in the gas phase.

@article{Polfer2005InfraredFS,
  title={Infrared fingerprint spectroscopy and theoretical studies of potassium ion tagged amino acids and peptides in the gas phase.},
  author={Nick C. Polfer and B{\'e}la Paizs and Lavina C. Snoek and Isabelle Compagnon and S{\'a}ndor Suhai and Gerard Johannes Meijer and Gert von Helden and Jos Oomens},
  journal={Journal of the American Chemical Society},
  year={2005},
  volume={127 23},
  pages={
          8571-9
        }
}
Infrared multiple-photon dissociation spectroscopy is effected on the K(+) tagged aromatic amino acids tyrosine and phenylalanine, as well as the K(+) tagged peptides bradykinin fragment 1-5 and [Leu]-enkephalin. The fingerprint (800-1800 cm(-1)) infrared spectra of these species are compared to density-functional theory (DFT) calculated spectra to determine whether the complex is in the charge solvation (CS) or salt bridge (SB) (i.e. zwitterionic) configuration. For the aromatic amino acids… CONTINUE READING
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