This article has been updated to clarify that John Nelson referred to the processivity of specific exonucleases, not all exonucleases.

Oxford Nanopore Technologies said this week that the firm's detector technology possesses sufficient accuracy and reliability to become part of a commercial DNA sequencer, after company researchers and their partners at the University of Oxford showed they can reliably identify five different DNA building blocks, including methylated cytosine, as they pass through a protein nanopore.

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In Science this week: gene linked to expansion of the human neocortex, and more.

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