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. Author manuscript; available in PMC: 2015 Oct 24.
Published in final edited form as: Analyst. 2015 Oct 12;140(21):7184–7194. doi: 10.1039/c5an01710f

Figure 1.

Figure 1

NanoESI mass spectra of cytochrome c in water (left column), 200 mM ammonium acetate (middle column), and 200 mM ammonium bicarbonate (right column) with no supercharging reagent (a, g, l), 1.5% m-NBA (b, h, m), 5% sulfolane (c, i, n), 5% PC (d, j, o), 2% 2-thiophenone (e), and 2% HD (f, k, p).