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Lation in the MCPs. This deactivates CheA and hence decreases the concentration of CheY-P. Restoration of typical swimming behavior, with the pre-stimulus rate of tumbling, ensues. In Figures 7C and D, the schematized structure of an MCP (C) plus a postulated mechanism of regulation (D) are presented. The extracytoplasmic receptor domain receives a signalJ Mol Microbiol Biotechnol. Author manuscri