he Effect of Phosphorylation on the Electron Capture Dissociation of Peptide Ions

Creese and Cooper

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Figure 4.

ECD mass spectra of triply-charged synthetic (APLS1FRGS2LPKS3YVK) peptide ions
obtained at “standard” (-3.34 V) ECD cathode potential. (a) Unmodified peptide (12 scans);
(b) Ser1 phosphopeptide (10 scans); (c) Ser2 phosphopeptide (12 scans); (d) Ser3
phosphopeptide (12 scans); (e) Ser1, Ser2 phosphopeptide (11 scans); (f) Ser1, Ser3
phosphopeptide (9 scans); (g) Ser2, Ser3 phosphopeptide (10 scans); (h) Ser1, Ser2, Ser3
phosphopeptide (9 scans).

Published as: JAm SocMass Spectrom. 2008 September ; 19(9): 1263-1274.