Guanine (G) rich G4T4G4 DNA and homologous PNA strands tend to form antiparallel dimeric quadruplexes. In contrast, the same DNA strands carrying planar aromatic 5â²-residues preferentially form parallel DNA quadruplex. Conformation and composition of the DNA quadruplexes can be programed by ÏâÏ-stacking interaction exerted by the 5â²-residues.
富含
鸟嘌呤(G)的G4T4G4 DNA和同源
PNA链倾向于形成反平行的二聚四链体。相比之下,携带平面芳香性5'残基的相同DNA链则优先形成平行DNA四链体。DNA四链体的构象和组成可以通过5'残基施加的π-π堆叠相互作用进行编程。