Quadruplex Structures
It also allows formation of secondary structures of single stranded DNA and RNA G-rich called G-quadruplexes (G4-DNA and G4-RNA) at least in vitro. It needs four triplets of G, separated by short spacers. This permits assembly of planar quartets which are composed of stacked associations of hoogsteen bonded guanines.
Read more about this topic: Hoogsteen Base Pair
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