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Organization of the RK2 origin region. The scheme presents the RK2 plasmid origin region (oriV), which contains DnaA protein binding sites (DnaA-boxes), plasmid replication initiator binding sites (iterons) and an AT-rich region with DUE. Within the DUE, four 13-mer repeats can be identified (marked as black arrows). DnaA-box sequences are depicted as gray arrows; iterons as gray triangles. The origin region is not drawn to scale.
