Using nanopores to sequence biopolymers was proposed more than a decade ago1. Recent advances in enzyme-based control of DNA translocation2 and in DNA nucleotide resolution using modified biological pores3 have satisfied two technical requirements of a functional nanopore DNA sequencing device. Nanopore sequencing of proteins was also envisioned1. Although proteins have been shown to move through nanopores4, 5, 6, a technique to unfold proteins for processive translocation has yet to be demonstrated. Here we …
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