| gyrase | The procaryotic topoisomerase II that utilises ATP to generate negative supercoils of DNA. Origin: L. Gyro, to turn in a circle, fr. Gyrus, G. Gyros (05 Mar 2000) |
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| DNA gyrase | <enzyme, molecular biology> A type II topoisomerase of Escherichia coli, that is essential for DNA replication. This enzyme can induce or relax supercoiling. (18 Nov 1997) |
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| DNA reverse gyrase | <enzyme> A topoisomerase II subclass which introduces positive superhelical turns into DNA Registry number: EC 3.1.- Synonym: reverse gyrase (26 Jun 1999) |