Journal of the American Society for Mass Spectrometry

, Volume 15, Issue 9, pp 1341–1353 | Cite as

Nanoflow LC/IMS-MS and LC/IMS-CID/MS of protein mixtures

  • Renã A. Sowell
  • Stormy L. Koeniger
  • Stephen J. Valentine
  • Myeong Hee Moon
  • David E. ClemmerEmail author


A simple ion trap/ion mobility/time-of-flight (TOF) mass spectrometer has been coupled with nanoflow liquid chromatography to examine the feasibility of analyzing mixtures of intact proteins. In this approach proteins are separated using reversed-phase chromatography. As components elute from the column, they are electrosprayed into the gas phase and separated again in a drift tube prior to being dispersed and analyzed in a TOF mass spectrometer. The mobilities of ions through a buffer gas depend upon their collision cross sections and charge states; separation based on these gas-phase parameters provides a new means of simplifying mass spectra and characterizing mixtures. Additionally it is possible to induce dissociation at the exit of the drift tube and examine the fragmentation patterns of specific protein ion charge states and conformations. The approach is demonstrated by examining a simple three-component mixture containing ubiquitin, cytochrome c, and myoglobin and several larger prepared protein mixtures. The potential of this approach for use in proteomic applications is considered.


Charge State Drift Tube Electron Capture Dissociation Drift Time Flight Time 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© American Society for Mass Spectrometry 2004

Authors and Affiliations

  • Renã A. Sowell
    • 1
  • Stormy L. Koeniger
    • 1
  • Stephen J. Valentine
    • 1
  • Myeong Hee Moon
    • 1
  • David E. Clemmer
    • 1
    Email author
  1. 1.Department of ChemistryIndiana UniversityBloomingtonUSA

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