Fig. 10From: Advances in mass spectrometry-based approaches for characterizing monoclonal antibodies: resolving structural complexity and analytical challengesA positive ESI 9.4 T Fourier Transform-Ion Cyclotron Resonance (FTICR) mass spectra for an IgG1 therapeutic antibody with a charge state distribution ranging from 42+ to 58+ was obtained from the recombinant, humanized IgG1 molecular structure (inset). Reprinted with permission from Ref (Mao et al. 2013). Copyright 2009 American Chemical SocietyBack to article page