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. Author manuscript; available in PMC: 2012 Jul 15.
Published in final edited form as: Anal Chem. 2011 Jun 22;83(14):5598–5606. doi: 10.1021/ac200695d

Figure 1.

Figure 1

(a) The layout of Hybrid Qq-FTICR instrument. (b) ECD top-down sequencing by FTICR MS: (1) after selection of one charge state in the quadrupole region and fragmentation in the ICR trap (top); (2) after selection and fragmentation in the FTICR trap (middle); and (3) with no pre-selection by quadrupole or in the ICR trap (bottom).