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(A) Cartoon showing the stationary integron platform containing the intI gene, attI recombination site, and the pant promoter and the mobile gene cassette containing an ORF and attC site (shaded circle). The recombination site is marked with an X. (B) MR integron with one gene cassette. (C) SI with several gene cassettes and homogenous attC sites. Gene cassette primer sites are indicated with arrows.
