0000000000364366
AUTHOR
Christophe Nicolas
showing 2 related works from this author
Ionization energy of gas phase protein cations and its dependence on charge state_and structure
2013
Ionization energy of gas phase protein cations and its dependence on charge state_and structure. Synchrotron SOLEIL Users Meeting
Oxygen K-shell spectroscopy of isolated progressively solvated peptide
2020
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…