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Schematic representation of part of recombinant plasmid pC631E containing the atypical class 1 integron in strain Sf631 (A) and of recombinant plasmid pC2023B containing the class 2 integron in strain Ss2023 (B). The horizontal arrows indicate the translation orientation. The solid lines represent the sequenced fragments, with the different genes boxed, and the dotted lines indicate the unanalyzed sequences.
