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. Author manuscript; available in PMC: 2006 Jan 6.
Published in final edited form as: J Am Chem Soc. 2003 Mar 5;125(9):2817–2826. doi: 10.1021/ja0211508

Figure 2.

Figure 2

Electrospray ionization mass spectra of cytochrome c from a 50:50 water/methanol solution with 2% acetic acid and a solution concentration of 10−4 M detected (a) directly and (b) after charge reduction with triethylamine. The inset is an expansion around m/z 1766 showing the isotopic distributions from the M7 (monomer) and D14 (dimer) ions.