Interaction between human telomeric G-quadruplexes characterized by single molecule magnetic tweezers*

Project supported by the National Natural Science Foundation of China (Grant Nos. 11474346 and 11774407), the Key Research Program of Frontier Sciences, Chinese Academy of Sciences (Grant No. QYZDB-SSW-SLH045), and the National Key Research and Development Program, China (Grant No. 2016YFA0301500).

Wang Yi-Zhou1, 3, Hou Xi-Miao2, Ju Hai-Peng1, Xiao Xue1, 3, Xi Xu-Guang2, Dou Shuo-Xing1, 3, Wang Peng-Ye1, 3, ‡, Li Wei1, §
       

(color online) Force ramp experiments of dimeric G-quadruplexes and mono G-quadruplex. (a) Typical force responses of dual G-quadruplexes in a stretching cycle (upper panel) with a loading rate of 16 pN/s (lower panel). (b) Unfolding force distribution of the first G-quadruplex in the dimeric G-quadruplexes fitted with Evans model (upper panel, N = 200) and monomeric G-quadruplex (lower panel, N = 198).