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Positive control of Z ring positioning. Shown are models for positive spatial regulation of Z rings by PomZ in Myxococcus xanthus (A); MapZ/LocZ in Streptococcus pneumoniae (B); SsgB in Streptomyces aerial mycelia that are developing into spores (C). A sample cell cycle progression is shown for each. The above regulators are represented by pink spheres, FtsZ as orange spheres, and nucleoids as blue ovals.
