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arXiv 1206.0924physics.bio-phq-bio.BM
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DNA的转录和俯仰角

Transcription and the Pitch Angle of DNA

Kasper W. Olsen, Jakob Bohr

摘要:

从转录的几何分析的角度访问的DNA的螺距角的值的问题。这表明,为了使转录成为可能,B-DNA的螺距角必须小于零扭转角。在零扭转角的双螺旋最大限度地旋转,其应变扭转耦合消失。基于微分几何的B-DNA的俯仰角的数值估计与从现有的经验数据中获得的数字进行比较。晶体学研究表明螺距角约为38 °,小于41.8 °的相应零扭转角,这与所建议的转录原则一致。

英文摘要:

The question of the value of the pitch angle of DNA is visited from the perspective of a geometrical analysis of transcription. It is suggested that for transcription to be possible, the pitch angle of B-DNA must be smaller than the angle of zero-twist. At the zero-twist angle the double helix is maximally rotated and its strain-twist coupling vanishes. A numerical estimate of the pitch angle for B-DNA based on differential geometry is compared with numbers obtained from existing empirical data. The crystallographic studies shows that the pitch angle is approximately 38 deg., less than the corresponding zero-twist angle of 41.8 deg., which is consistent with the suggested principle for transcription.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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