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. Author manuscript; available in PMC: 2007 Jan 31.
Published in final edited form as: J Am Soc Mass Spectrom. 2006 Jul 12;17(9):1299–1305. doi: 10.1016/j.jasms.2006.06.005

Figure 2.

Figure 2

The transmission of Leucine Enkephalin, Reserpine, Bradykinin and Ubiquitin ions as a function of pressure. The data for Bradykinin represent the sum of 2+ and 3+ charge states, while the data for Ubiquitin represent the sum of 7+ to 13+ charge states. Each data set is normalized to its own high intensity point. Both ion funnels were operated at 560 kHz and 70 Vp-p.