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. Author manuscript; available in PMC: 2011 Nov 4.
Published in final edited form as: Bioorg Med Chem. 2006 Oct 26;15(2):759–770. doi: 10.1016/j.bmc.2006.10.051

Figure 2.

Figure 2

Structures of the (a) pyrrole-benzimidazole internal dimer (-Py-Bi-), (b) imidazole-imidazopyridine internal dimer (-Im-Ip-), and (c) imidazole-imidazopyridine cap (Im-Ip-) in comparison with their respective five membered ring systems. Hydrogen-bonding surfaces to the DNA minor-groove floor are bolded.