图1. G-四链体结构组成.(a) G-四集体通过Hoogsteen氢键形成;(b) G-四链体结构中心被一价阳离子稳定
Fig.1. The structural composition of G-quadruplex. (a) G-tetrad formed by Hoogsteen hydrogen-bond; (b) The central structure of G-quadruplex is stabilized by monovalent cation