标题： DNA中的电子输运 显示英文标题

标题： Electronic Transport in DNA

摘要： 我们通过将紧束缚模型应用于四种特定的DNA序列，研究DNA的电子性质。 电荷传输特性以局域化长度来表示，粗略地说，是电子移动的长度。 采用了各种类型的无序，包括随机势，以解释不同的真实环境。 我们对聚(dG)-聚(dC)、端粒DNA、随机ATGC DNA和λ-DNA进行了计算。 我们发现随机DNA和λ-DNA的局域化长度仅允许电子在几十个碱基对之间移动。 在增加的二进制骨架无序下，特定能量处观察到局域化长度的新型增强。 我们评论了DNA中序列依赖的电荷传输可能的生物学意义。 显示英文摘要

摘要： We study the electronic properties of DNA by way of a tight-binding model applied to four particular DNA sequences. The charge transfer properties are presented in terms of localisation lengths, crudely speaking the length over which electrons travel. Various types of disorder, including random potentials, are employed to account for different real environments. We have performed calculations on poly(dG)-poly(dC), telomeric-DNA, random-ATGC DNA and lambda-DNA. We find that random and lambda-DNA have localisation lengths allowing for electron motion among a few dozen base pairs only. A novel enhancement of localisation lengths is observed at particular energies for an increasing binary backbone disorder. We comment on the possible biological relevance of sequence dependent charge transfer in DNA.