Sarma M H, Gupta G, Sarma R H
FEBS Lett. 1986 Sep 15;205(2):223-9. doi: 10.1016/0014-5793(86)80902-4.
500 MHz 1H NMR studies using 2D-NOESY indicate that the oligonucleotide d(CTCTCT) at low pH forms a parallel double helix with cytosine . cytosine base pairs and thymine . thymine bulges. This unusual structure may explain the hypersensitivity of S1 nuclease at low pH towards supercoiled plasmids containing d(CT)n inserts.
使用二维核欧沃豪斯效应光谱(2D - NOESY)的500兆赫质子核磁共振(1H NMR)研究表明,低pH值下的寡核苷酸d(CTCTCT)与胞嘧啶形成平行双螺旋结构,存在胞嘧啶.胞嘧啶碱基对和胸腺嘧啶.胸腺嘧啶凸起。这种不寻常的结构可能解释了S1核酸酶在低pH值下对含有d(CT)n插入片段的超螺旋质粒的超敏反应。