Structure and Charge-State Dependence of the Gas-Phase Ionization Energy of Proteins.

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Giuliani, Alexandre | Milosavljević, Aleksandar R | Hinsen, Konrad | Canon, Francis | Nicolas, Christophe | Réfrégiers, Matthieu | Nahon, Laurent

Edité par CCSD ; Wiley-VCH Verlag -

International audience. Photoionization of protein ions: The ionization energy of polyprotonated protein cations in the gas phase measured using VUV synchrotron radiation appears to be correlated with the charge state z of the protein and its tertiary structure. A simple electrostatic model accounts for the results and also shows predictive capabilities to derive a mean radius R(m) of the protein ion from the ionization energy, and vice versa.

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