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Diamidines are a class of compounds that target the minor groove of DNA and have antiparasitic and antimicrobial properties. Their mechanism of action has not been fully elucidated, but may include changes in DNA topology. In this study we have investigated such changes using methods of gel electrophoresis including ligation ladders and cyclization assays. We found that topology changes were sequence dependent. Compounds typically caused non-anomalously migrating ATATA sequences to migrate asdoi:10.57709/1059239 fatcat:qt4klm7rfngyjmxsar5spqdtky