VUV photofragmentation of protonated leucine-enkephalin peptide: partial ion yield dependence on type of sequence fragments

International audience

Oxygen K-shell spectroscopy of isolated progressively solvated peptide

Gas-phase near-edge X-ray-absorption fine structure (NEXAFS) action spectroscopy around the oxygen K-edge and mass spectrometry were employed to probe isolated substance P (SP) molecular ions, both bare and progressively solvated with 4 and 11 water molecules. Detailed mass spectra of bare and hydrated precursors are presented for the resonant photon energy of 532 eV that corresponds to O1s --> pi(amide)* core excitation, triggering resonant Auger decay and fragmentation from the ionized radical molecular system. The fragmentation pattern of doubly protonated SP hydrated with 4 water molecules clearly shows a series of abundant doubly charged backbone fragments, as well as triply charged pr…

Application of VUV synchroton radiation to proteomic and analytical mass spectrometry

Application of VUV synchroton radiation to proteomic and analytical mass spectrometry. 11. international conference on Synchroton radiation instrumentation (Sri 2012)

L'influence de la nanosolvation sur la stabilité des peptides à l'étude du gaz

VUV photodissociation of bare and nanosolvated protonated nucleotide isolated in the gas phase

International audience