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. Author manuscript; available in PMC: 2015 Dec 23.
Published in final edited form as: Curr Opin Struct Biol. 2006 May 22;16(3):288–298. doi: 10.1016/j.sbi.2006.05.011

Figure 1.

Figure 1

Polymorphism of the loops connecting individual strands of the G-quadruplex: (a) edgewise loop, (b) diagonal loop, (c) double-chain-reversal loop and (d) V-shaped loop. Adapted with permission from [69].