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Integration of CTn9343 in another foreign genetic element. The real ends of CTn9343 are tnpB (left) and tnpA2 (right). The regions flanking these ends (ORFs 1 to 7 and 62 to 66) are part of another genetic element integrated into the B. fragilis chromosome (dotted lines). Relative positions of primers Tn24 and Tn23 to generate hsdS4 are shown.
