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. Author manuscript; available in PMC: 2014 Dec 17.
Published in final edited form as: Anal Chem. 2013 Nov 22;85(24):11966–11972. doi: 10.1021/ac402906d

Figure 4.

Figure 4

Reactive DESI-MS spectra of lysozyme in the sample transfer capillary (“S”) and the DESI probe (“D”) spraying (a) 200 μM NAG3, and (b) 200 μM NAG6 in 20 mM NH4OAc aqueous solution. (apo – open circles; holo – filled circles)