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. 1989 Oct;33(10):1816–1818. doi: 10.1128/aac.33.10.1816

Inhibitory effects of quinolones on DNA gyrase of Escherichia coli and topoisomerase II of fetal calf thymus.

K Hoshino 1, K Sato 1, T Une 1, Y Osada 1
PMCID: PMC172762  PMID: 2556080

Abstract

The in vitro inhibitory effects of quinolones on the bacterial DNA gyrase of Escherichia coli KL-16 and topoisomerase II of fetal calf thymus were compared. All the quinolones tested required higher concentrations to inhibit the topoisomerase II than to inhibit the DNA gyrase, and no correlation existed among their inhibitory activities against both enzymes. However, there was a large difference among the quinolones in their selectivities between the bacterial enzyme and its eucaryotic counterpart. The selectivity of ofloxacin was highest, and the selectivities of CI-934 and nalidixic acid were lowest.

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Selected References

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