Quadrifoglio F, Manzini G, Vasser M, Dinkelspiel K, Crea R
Nucleic Acids Res. 1981 May 11;9(9):2195-206. doi: 10.1093/nar/9.9.2195.
The conformation of d (CG)n oligomers with n = 2,3 has been studied in aqueous solution in the presence of high salt concentration. A minimum n value of three is necessary to obtain a left-handed Z-helix. When d (CG)3 is flanked by three non Z-helicogenic alternating AT sequences the left-handed helix is unstable and a B-type conformation is obtained also at high salt concentration.
已在高盐浓度存在的情况下,对n = 2、3时的d(CG)n寡聚物在水溶液中的构象进行了研究。要获得左手Z型螺旋,n的最小值为3。当d(CG)3两侧有三个非Z螺旋形成性交替AT序列时,左手螺旋不稳定,即使在高盐浓度下也会获得B型构象。