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. Author manuscript; available in PMC: 2018 Feb 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2016 Oct 12;28(2):332–340. doi: 10.1007/s13361-016-1517-7

Figure 4.

Figure 4

Zmax (purple square), Zav (pink triangles), ZR(CCS) (blue circles) for protein ions formed from aqueous ammonium acetate (filled) or pure water (open) relative to ZR (green line) as a function of molecular weight. ZR represents the maximum number of charges on a protein predicted using the Rayleigh limit for a droplet the same size as a spherical protein with a density of 1.0 g/cm3. ZR(CCS) represents the maximum number of charges predicted using the Rayleigh limit for a spherical droplet with the same radius as the CCSav for the protein ions.