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. Author manuscript; available in PMC: 2010 Sep 9.
Published in final edited form as: J Am Chem Soc. 2009 Sep 9;131(35):12548–12549. doi: 10.1021/ja905739j

Figure 1.

Figure 1

Structures of dT, dF and dA and a hypothetical dF:dA pair. Putative H-bonds are dashed lines; arrows designate distances d1 [F4 (dF)…N6(dA)], d2 [C3(dF)…N1(dA)] and d3 [F2(dF)…C2(dA)].