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Identification and verification of the peptide bearing PB-DOPA (HHQTYOHVTNLNNLIK). Tandem mass spectra (A-C). Tryptic peptide ion from His6-tagged purified protein (A), synthetic peptide corresponding to the sequences identified in A (B) and mixture of A and B (C). Extracted ion chromatograms of focus ion scans (D-F). Tryptic peptide ion from His6-tagged purified protein (D), synthetic peptide corresponding to the sequences identified in D (E) and mixture of D and E (F).
