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. Author manuscript; available in PMC: 2015 Apr 8.
Published in final edited form as: Anal Chem. 2007 Mar 23;79(9):3271–3279. doi: 10.1021/ac0617363

Figure 2.

Figure 2

(+)NanoESI/FTICR MS of the same S-layer glycopeptide (cf., Figure 1). Sample concentration, 7 pmol μL−1 in water/methanol/formic acid (49/49/2, v/v/v %); capillary exit voltage, 37.7 V. Inset: Enlarged area (2072-2100 m/z) showing the isotopic pattern of the quadruply charged ions of m/z 2076.120 corresponding the Ru = 15 glycoform and its sodiated adducts, respectively. Enlarged area (1650-1700 m/z) showing the isotopic pattern of the quintuply charged ions to the Ru = 15 glycoform. The most abundant species at m/z 1674.2858 corresponds to [M + 2H + 3Na]5+ of the Ru = 15 glycoform. The intensity of the CSD fragment ions is significantly reduced.