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. Author manuscript; available in PMC: 2008 Dec 1.
Published in final edited form as: J Proteome Res. 2007 Oct 26;6(12):4711–4719. doi: 10.1021/pr700571d

Figure 1.

Figure 1

Product-ion spectra of the ESI-produced [M + 2H]2+ ions of tryptic peptides of (a) KTTTT77PGR (m/z 472.5), (b) EPSEVPT52PK (m/z 532.4), and (c) KQPPVS35PGTALVGSQK (m/z 837.5) in HMGA1a that was phosphorylated by HIPK2. The phosphorylated residues are highlighted in gray italic fonts in the peptide sequences. An asterisk (*) indicates that a fragment ion bears a phosphate group. A scheme summarizing the observed fragment ions for each peptide is shown on the top right of each panel.