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As a follow-up of a previous question, I would like to know what enzymes or protein complexes have been used to manipulate DNA samples into stabilizing DNA loops.

I have read that cohesin is one of such enzymes, but works as a transcription factor by binding specific DNA motifs.

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My interest is in knowing what other enzymes will create DNA loops with no DNA motif biases from a DNA extraction.

This is a follow-up question to this one, as ultimately I would like to know if there could be any ways of optimizing the process of DNA circularization of very long stretches of human (or mammalian) double-stranded DNA, from several kilobases to megabases, by first creating stable DNA loops that leave two DNA ends close by for a more effective ligation process.

Any ideas?

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With specific attention to more efficient ligation (e.g., after restriction enzyme digestion), there are commercial products on the market that use a modified topoisomerase to catalyze such a ligation. –  leonardo Apr 14 at 19:25

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