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. Author manuscript; available in PMC: 2017 Aug 31.
Published in final edited form as: J Am Chem Soc. 2016 Aug 17;138(34):10849–10859. doi: 10.1021/jacs.6b03905

Figure 1.

Figure 1

HCD and UVPD of 13+ and 15+ tetrameric streptavidin. In a) and d) HCD of the 13+ and 15+ charge states is shown, respectively. In b) and e) 1.0 mJ UVPD of the 13+ and 15+ charge states is shown and in c) and f) 3.0 mJ UVPD of the 13+ and 15+ charge states is shown. The bracket in c) denotes the region populated by fragments originating from cleavages of the protein backbone (i.e. sequence-type ions).