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Localization of genes carried by one of the repeated arms of pSM19035. Regions SegA and SegB are involved in plasmid maintenance. SegA controls random plasmid distribution (resolvase β and topoisomerase γ). The SegB region contains genes encoding the plasmid addiction system (ɛ and ζ), a global regulator of plasmid gene expression (ω), and a putative ATPase (δ). Repeated sequences (WATCACW) in the promoter regions of copS, δ, and ω are denoted by arrows.
