Proton transfer reactions for improved peptide characterisation (CROSBI ID 572997)
Prilog sa skupa u zborniku | sažetak izlaganja sa skupa | međunarodna recenzija
Podaci o odgovornosti
Rožman, Marko ; Schneider, Andrea ; Gaskell, Simon J. ;
engleski
Proton transfer reactions for improved peptide characterisation
The combination of deprotonation (via ion/molecule and ion/ion reactions) and low-energy collision induced dissociation (CID) has been explored for the enhanced characterisation of tryptic peptides via access to different precursor charge states. This approach allows instant access to fragmentation properties of singly and doubly protonated precursors (arising from the availability of mobile protons) in a single experiment. Considering both charge states extended our base of structurally informative data (in comparison with considering just a single charge state) due to generation of additional sequence ions and by obtaining supplementary structural information derived from selective cleavages. Roughly 37 % of combined data sets (CID spectra of doubly and singly charged precursor) showed a greater database identification confidence than each set alone. Moreover, comparison between a number of sequence ions of the singly charged precursor and the doubly charged precursor provided a mean of distinguishing the two classes of tryptic peptides (arginine or lysine containing).
ion/molecule reaction; ion/ion reaction; collision induced dissociation; peptide identification; charge state
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Podaci o prilogu
28-28.
2011.
objavljeno
Podaci o matičnoj publikaciji
978-88-89884-19-5
Podaci o skupu
29th Informal Meeting on Mass Spectrometry
predavanje
15.05.2011-19.05.2011
Fiera di Primiero, Italija