Editing Integron (section)

=== Gene cassettes ===
{{Main article|Gene cassette|l1=Gene cassette}}
Additionally, an integron will usually contain one or more gene cassettes that have been incorporated into it. The gene cassettes may encode genes for [[antibiotic resistance]],<ref>{{Cite journal |last1=Hipólito |first1=Alberto|last2=García-Pastor |first2=Lucía |last3=Vergara |first3=Ester |last4=Jové |first4=Thomas |last5=Escudero|first5=José Antonio |date=2023 |title=Profile and resistance levels of 136 integron resistance genes |journal=npj antimicrobials and resistance |doi=10.1038/s44259-023-00014-3|doi-access=free |pmc=11721406 }}</ref> although most genes in integrons are uncharacterized. An ''attC'' sequence (also called 59-be) is a repeat that flanks cassettes and enables cassettes to be integrated at the ''attI'' site, excised and undergo [[horizontal gene transfer]].