title: VUV action spectroscopy of protonated leucine-enkephalin peptide in the 6-14 eV range.
abstract: We have studied the Vacuum Ultraviolet (VUV) photodissociation of gas-phase protonated leucine-enkephalin peptide ion in the 5.7 to 14 eV photon energy range by coupling a linear quadrupole ion trap with a synchrotron radiation source. We report VUV activation tandem mass spectra at 6.7, 8.4, and 12.8 eV photon energies and photodissociation yields for a number of selected fragments. The obtained results provide insight into both near VUV radiation damage and electronic properties of a model peptide. We could distinguish several absorption bands and assign them to particular electronic transitions, according to previous theoretical studies. The photodissociation yields appear to be very different for the various observed fragmentation channels, depending on both the types of fragments and their position along the peptide backbone. The present results are discussed in light of recent gas-phase spectroscopic data on peptides.
authors.affiliation: Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia.
authors.forename: M Lj
authors.initials: MLj
authors.lastname: Ranković
authors.affiliation: INRA, UMR1324 Centre des Sciences du Goût et de l'Alimentation, F-21000 Dijon, France.
authors.forename: F
authors.initials: F
authors.lastname: Canon
authors.affiliation: SOLEIL, l'Orme des Merisiers, St Aubin, BP48, 91192 Gif sur Yvette Cedex, France.
authors.forename: L
authors.initials: L
authors.lastname: Nahon
authors.affiliation: SOLEIL, l'Orme des Merisiers, St Aubin, BP48, 91192 Gif sur Yvette Cedex, France.
authors.forename: A
authors.initials: A
authors.lastname: Giuliani
authors.affiliation: Institute of Physics Belgrade, University of Belgrade, Pregrevica 118, 11080 Belgrade, Serbia.
authors.forename: A R
authors.initials: AR
authors.lastname: Milosavljević
mesh_terms: D004745:Enkephalins / Q000737:chemistry*; D007930:Leucine / Q000737:chemistry*; D010455:Peptides / Q000737:chemistry*; D010782:Photolysis / Q000528:radiation effects; D011522:Protons; D013056:Spectrophotometry, Ultraviolet; D014466:Ultraviolet Rays
chemical_list: D004745:Enkephalins; D010455:Peptides; D011522:Protons; D007930:Leucine