Involved in restoring normal CheY-P levels following the addition of attractant by increasing the rate of CheY-P hydrolysis. Is only 6% as active as FliY, which indicates that CheC may function after addition of an attractant to cope with increased levels of CheY-P whereas FliY may function constitutively to remove CheY-P around the flagellar switch to maintain an optimal level of CheY-P. In addition, it was shown to prevent methylation of the methyl-accepting chemotaxis proteins (MCPs). Inhibits CheD. Forms a complex with CheD. Cells fail to synthesize flagellin protein and grow as long filaments. They do not respond to attractants. CheC mutants showed overmethylation of the MCPs compared with wild-type strain. Belongs to the CheC family.