The ftsZ ( sulB ) coding sequence is preceded by two promoters, at least one of which lies within the coding sequence of the neighboring gene, ftsA . This region of the ftsA gene is required for full biological activity of ftsZ .

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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC215576PMC
http://dx.doi.org/10.1128/jb.158.3.1198-1201.1984DOI Listing

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