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. Author manuscript; available in PMC: 2018 Jun 20.
Published in final edited form as: Biochemistry. 2017 Jun 12;56(24):2985–2994. doi: 10.1021/acs.biochem.6b01192

Figure 3.

Figure 3

Chemical structures of guanine and several chemically modified guanine molecules studied in this work. Experimental pKa values at the N1 position (taken from Refs. 90, 91) are shown.