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. Author manuscript; available in PMC: 2014 Nov 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2013 May 16;24(11):1623–1633. doi: 10.1007/s13361-013-0621-1

Figure 2. AI-ETD of the peptide RPKPQQFFGLM.

Figure 2

AI-ETD performed in the MDC (B) improves fragmentation of the peptide RPKPQQFFGLM as compared to MDC ETD alone (A). AI-ETD also reduces hydrogen abstraction which can inhibit manual and automated spectral interpretation (insets).