Analyzing Single DNA Molecules by Nanopore Translocation
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Small holes in membranes or nanocapillaries can be employed to detect single molecules in solution. In fact, the resistive-pulse technique based on nanopores allows for determination of length, charge, and folding state of deoxyribonucleic acid (DNA). Here, we describe the experimental procedures necessary for measuring single DNA molecules in nanocapillaries. We also discuss the measures for data analysis and how to determine that only single molecule events are observed.
Key wordsNanopore DNA translocation Biopolymers Polymer transport Single molecule sensors Resistive-pulse technique Nanocapillary
We would like to thank Cees Dekker, Nynke, Dekker, Serge Lemay, and Derek Stein for their help and discussions about solid-state nanopores. Gunter Stober helped with developing the measurement program. We thank Oliver Otto, Catalin Chimerel, and Joanne Gornall for providing technical assistance and discussions. Financial support of the Emmy Noether program of the DFG and the Deutsche Telekom Stiftung (Ph.D. grant for L.J.S.) is gratefully acknowledged.
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