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Schematic overview of repression of the fliFGHIJK operon by PdeL. PdeL represses the transcription of the class II flagellar operon fliFGHIJK. The expression of pdeL is repressed by H-NS. In addition, PdeL is a catalytically active c-di-GMP phosphodiesterase. The activation of fliE and fliFGHIJK expression by FlhD4C2 and repression by CsgD integrate flagellar class II gene expression into the regulatory network that controls motility and sessility.
