A new class of DNA quadruplexes formed by oligodeoxyribonucleotides containing a 3'-3' or 5'-5' inversion of polarity site.

@article{Espsito2005ANC,
  title={A new class of DNA quadruplexes formed by oligodeoxyribonucleotides containing a 3'-3' or 5'-5' inversion of polarity site.},
  author={Ver{\'o}nica Esp{\'o}sito and Antonella Virgilio and Antonio Randazzo and Aldo Galeone and Luciano Mayol},
  journal={Chemical communications},
  year={2005},
  volume={31},
  pages={
          3953-5
        }
}
Unprecedented DNA quadruplex structures containing a 3'-3' or 5'-5' inversion of polarity site in the G-tract are presented; the quadruplexes are characterized by different elements of symmetry and glycosidic angle conformations.