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Knots have been removed from DNA by stretching the molecular strands with an electric field. The work was done by researchers in the US, who have quantified how stretching causes a knot to move along DNA so that it vanishes when it reaches the end of the strand.  The experiment also gives insights into how nanoscale knots can become jammed on a strand. Understanding how to untangle knots in molecular strands could improve DNA sequencing technologies and lead to better polymer-based industrial processes.

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Category: Science