title: Photoionization of a protein isolated in vacuo.
abstract: Gas phase VUV single-photon photoionization spectroscopy of electrospray-produced multiply protonated cytochrome c protein (12 kDa) has been performed by means of coupling a linear quadrupole ion trap with a synchrotron beamline. The thresholds for the ionization of the 8+ and 11+ charge state precursors to radical 9+ and 12+ species were measured to be 12.75 ± 0.10 and 13.51 ± 0.10 eV, respectively.
authors.affiliation: Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, B.P. 48, 91192 Gif-sur-Yvette, France. vraz@ipb.ac.rs
authors.forename: Aleksandar R
authors.initials: AR
authors.lastname: Milosavljević
authors.forename: Christophe
authors.initials: C
authors.lastname: Nicolas
authors.forename: Joel
authors.initials: J
authors.lastname: Lemaire
authors.forename: Christophe
authors.initials: C
authors.lastname: Dehon
authors.forename: Roland
authors.initials: R
authors.lastname: Thissen
authors.forename: Jean-Marc
authors.initials: JM
authors.lastname: Bizau
authors.forename: Matthieu
authors.initials: M
authors.lastname: Réfrégiers
authors.forename: Laurent
authors.initials: L
authors.lastname: Nahon
authors.forename: Alexandre
authors.initials: A
authors.lastname: Giuliani
mesh_terms: D045304:Cytochromes c / Q000737:chemistry*; D005740:Gases / Q000737:chemistry*; D007477:Ions / Q000737:chemistry; D021241:Spectrometry, Mass, Electrospray Ionization
chemical_list: D005740:Gases; D007477:Ions; D045304:Cytochromes c