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. Author manuscript; available in PMC: 2012 May 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2011 Mar 22;22(5):912–921. doi: 10.1007/s13361-011-0103-2

Figure 2.

Figure 2

Product ion spectra derived from (a) ion trap CID of [RKRARKE+BS3-Na-2(sulfo-NHS)-Na+2H]2+ and (b) ion trap CID of [RKRARKE+2H]2+. * denotes ions intra-molecularly cross-linked with BS3.