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. Author manuscript; available in PMC: 2015 Jan 1.
Published in final edited form as: J Inorg Biochem. 2013 Oct 14;130:103–111. doi: 10.1016/j.jinorgbio.2013.10.008

Figure 2.

Figure 2

Structures of the protonated and deprotonated forms of the ligands: a) 4,4′-dihydroxy-2,2′-bipyridine (44′bpy(OH)2) and b) 6,6′-dihydroxy-2,2′-bipyridine 66′bpy(OH)2).