Attractants sensor kinase Transducer(MCP) CheA Chew ATP CheW CheA CheA- P +CH3 Flagellar motor CheR CheB-P CheB CheY CheY-P CheZ response regulators -CH3 CheB and CheY Cytoplasmic membrane Cell wall CheA-P can then phosphorylate the response regulators CheB and CheY.Phosphorylated CheY (CheY-P)interacts directly with the flagellar motor switch. Chen Feng,Shanghai Jiao Tong UniversityChen Feng, Shanghai Jiao Tong University CheA-P can then phosphorylate the response regulators CheB and CheY. Phosphorylated CheY (CheY-P) interacts directly with the flagellar motor switch. response regulators CheB and CheY sensor kinase CheA