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. 2009 Jun 12;8(9):2170–2185. doi: 10.1074/mcp.M900088-MCP200

Fig. 7.

Fig. 7.

Multiple stage tandem MS analyses of differentially expressed tryptic glycopeptides of the wt and the pglD mutant of C. jejuni. MS2 spectrum of the glycopeptide ion at (a) m/z 1036.22 (3+) from the wt; (b) the equivalent ion at m/z 1022.20 (3+) from the pglD mutant; (c) MS3 spectrum of the same ion at m/z 1022.20 (3+) from the pglD mutant. The MS3 fragment ions were matched to TDQNITLVAPPEFQK of the C. jejuni periplasmic protein, Cj1670c by database searching using MASCOTTM with an ion score of 57 (NCBI accession no. YP_002345038). Bac, bacillosamine (2,4-diacetamido-2,4,6-trideoxyglucopyranose); deAcBac, monoacetylated bacillosamine at the C-2 position only (2-acetamido-4-amino-2,4,6-trideoxyglucopyranose) (30, 39, 40).