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. Author manuscript; available in PMC: 2013 Feb 15.
Published in final edited form as: Anal Biochem. 2011 Dec 13;421(2):712–718. doi: 10.1016/j.ab.2011.12.012

Figure 4. Inter-peptide cross-linking.

Figure 4

The MS/MS analysis of precursor ion with 1959.88 m/z, derived from the tryptic digest of the upper band of pGSN (~170kDa in Fig. 1 a) after cross-linking with the 11.4Å linker. This spectrum presents fragment ion assignment for two peptides, first H2N-(357)AALKTASDFITK(368)-COOH (the ions for this peptide are labeled with subscriptI) and second H2N-(297)LAKLYK(302)-COOH (the ions for this peptide are labeled with subscriptII). The ions labeled with (arm) superscript the fragments containing the masses with linker modifications.