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. Author manuscript; available in PMC: 2006 Jan 20.
Published in final edited form as: J Am Soc Mass Spectrom. 2003 Dec;14(12):1477–1487. doi: 10.1016/j.jasms.2003.08.005

Figure 7.

Figure 7

ESI mass spectra of partially esterified FLEEL in 60 mM NaCl and 1:1 water: methanol (a) without exchange and (b) after 50 s exchange with D2O at a pressure of (b) ~1 × 10−7 torr and (c) ~1 × 10−6 torr. The inset shows isomeric separation for FLEEL with one methyl-ester and one noncovalently adducted sodium ion.