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Phosphopeptide sequencing by MALDI-TOF/TOF of the C-terminal tail of AtPIP2;7.A, MS/MS spectrum of singly phosphorylated 270ALGSFRSNATN280 (m/z 1217.53).

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Presentation on theme: "Phosphopeptide sequencing by MALDI-TOF/TOF of the C-terminal tail of AtPIP2;7.A, MS/MS spectrum of singly phosphorylated 270ALGSFRSNATN280 (m/z 1217.53)."— Presentation transcript:

1 Phosphopeptide sequencing by MALDI-TOF/TOF of the C-terminal tail of AtPIP2;7.A, MS/MS spectrum of singly phosphorylated 270ALGSFRSNATN280 (m/z ). b6, y7, and y9 ions allowed identification of the phosphorylated residue as Ser273. Phosphopeptide sequencing by MALDI-TOF/TOF of the C-terminal tail of AtPIP2;7.A, MS/MS spectrum of singly phosphorylated 270ALGSFRSNATN280 (m/z ). b6, y7, and y9 ions allowed identification of the phosphorylated residue as Ser273. B, MS/MS spectrum of the corresponding diphosphorylated peptide (m/z ). b6 and b7 ions allowed identification of Ser273 and Ser276 as the phosphorylated residues. C, MS/MS spectrum of the corresponding triphosphorylated peptide (m/z ). b6, b7, b10, y3, and y5 ions allowed identification of Ser273, Ser276, and Thr279 as the phosphorylated residues. *, pS, [MH]+, [MH − P]+, [MH − P − 18]+, [MH − 2P − 18]+, and [MH − 2P − 2 × 18]+ are as explained in the legend of Fig. 2. pT, phosphorylated threonine. Sodana Prak et al. Mol Cell Proteomics 2008;7: © 2008 The American Society for Biochemistry and Molecular Biology

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