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. Author manuscript; available in PMC: 2015 Sep 15.
Published in final edited form as: Int J Mass Spectrom. 2014 Sep 15;370:75–95. doi: 10.1016/j.ijms.2014.06.016

Fig. 11.

Fig. 11

Upper panel: Mass spectrum of self-assembled guanosine. Lower panel: structures of the three peaks in the ATD of the nominal (4dG + NH4)+ mass spectral peak. Figure adapted from Ref. [102].