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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 3.

Figure 3

Reactive DESI-MS spectra of RNaseA (5 μM in 20 mM NH4OAc aqueous solution) in the sample transfer capillary (“S” ) and the DESI probe (“D”) spraying a mixture of (a) 50 μM CDP and 50 μM 2′-CMP (20 mM NH4OAc), and (b) 50 μM CTP, 50 μM CDP, and 50 μM 2′-CMP (20 mM NH4OAc). (apo – open circles; holo – filled circles)