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Phys Chem Chem Phys. 2011 Sep 14;13(34):15432-6. doi: 10.1039/c1cp21211g. Epub 2011 Jul 18.

Photoionization of a protein isolated in vacuo.

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  • 1Synchrotron SOLEIL, L'Orme des Merisiers, Saint Aubin, B.P. 48, 91192 Gif-sur-Yvette, France. vraz@ipb.ac.rs

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.

PMID:
21766124
DOI:
10.1039/c1cp21211g
[PubMed - indexed for MEDLINE]
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