Voltage-Driven DNA Translocations through a Nanopore

作者：A. MELLER, Lucas G. Nivón, Daniel Branton · 发表于：Physical Review Letters · 年份：2001 · DOI：10.1103/physrevlett.86.3435 · 被引用次数：895 · 研究领域：Nanopore and Nanochannel Transport Studies、RNA Interference and Gene Delivery、Lipid Membrane Structure and Behavior

We measure current blockade and time distributions for single-stranded DNA polymers during voltage-driven translocations through a single alpha-hemolysin pore. We use these data to determine the velocity of the polymers in the pore. Our measurements imply that, while polymers longer than the pore are translocated at a constant speed, the velocity of shorter polymers increases with decreasing length. This velocity is nonlinear with the applied field. Based on this data, we estimate the effective diffusion coefficient and the energy penalty for extending a molecule into the pore.