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. Author manuscript; available in PMC: 2009 Jun 23.
Published in final edited form as: J Am Soc Mass Spectrom. 2007 Jul 26;18(10):1783–1788. doi: 10.1016/j.jasms.2007.07.013

Figure 1.

Figure 1

Mass spectra derived from (a) positive nano-ESI of (18:0/20:4)-GPC, (b) negative APCI of azobenzene, (c) ion/ion ETD reaction of isolated doubly sodiated (18:0/20:4)-GPC cations with singly charged azobenzene anions in Q2 LIT for 400 ms.