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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Both DNA topoisomerases I and II relax 2 micron plasmid DNA in living yeast cells.

Measurements at various temperatures of the linking number of yeast 2 microns plasmid DNA in wild-type cells and in cells bearing mutations in the DNA topoisomerase I and II genes show that bulk 2 microns plasmid minichromosome are maintained in a relaxed state by the combined action of topoisomerases I and II. Bulk 2 microns minichromosomes are not under torsional stress in vivo and are not substrates for a putative gyrase-like topoisomerase.[1]

References

  1. Both DNA topoisomerases I and II relax 2 micron plasmid DNA in living yeast cells. Saavedra, R.A., Huberman, J.A. Cell (1986) [Pubmed]
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