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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2013 Aug 28;24(11):10.1007/s13361-013-0700-3. doi: 10.1007/s13361-013-0700-3

Figure 3.

Figure 3

FT-ICR tandem mass spectra of Ca2+-adducted N-glycan 2. (a) IRMPD (40 scans, 80 ms irradiation, 10 W laser power); (b) ECD (50 scans, 50 ms electron irradiation with a bias voltage of −0.2 V); (c) AI-ECD (40 scans, 20 ms irradiation with 10 W laser power, 100 ms electron irradiation with a bias voltage of −0.25 V). Product ions are underlined if they underwent sulfonate loss. The superscript ‘Ca’ indicates product ions bearing a calcium cation. Assignments indicated in bold are crossring product ions. * Denotes electronic noise