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d(G-C)结构的盐浓度依赖性的1H核Overhauser效应及圆二色性研究

A 1H nOe and CD study of the salt-concentration dependence of the structure of d(G-C).

作者信息

Reid D G, Salisbury S A, Williams D H

出版信息

Nucleic Acids Res. 1983 Jun 11;11(11):3779-93. doi: 10.1093/nar/11.11.3779.

Abstract

Intra- and internucleotide 1H nuclear Overhauser effects (nOes) have been observed in the synthetic decancleoside nonaphosphate d(G-C)5 at low and high salt concentrations, and in conditions under which duplex formation is complete. Comparison of the nOes with interproton distances derived from model and X-ray structures suggest that the duplex is right-handed up to a sodium chloride concentration of 4M, in contrast to the behaviour of poly [d(G-C)]. C.D. spectra are consistent with this suggestion.

摘要

在低盐和高盐浓度下,以及在双链体形成完全的条件下,已在合成的十聚脱氧胞苷九磷酸d(G-C)5中观察到核苷酸内和核苷酸间的1H核Overhauser效应(nOes)。将这些nOes与从模型和X射线结构得出的质子间距离进行比较表明,与聚[d(G-C)]的行为相反,在氯化钠浓度高达4M时双链体是右手螺旋的。圆二色光谱与这一推测一致。

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