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Multiple alignment of deduced amino acid sequences of AmpR, which regulates cephalosporinase genes. The origins of the AmpR sequences are as follows: 1, E. cloacae MHN-1; 2, Citrobacter freundii OS 60; 3, Yersinia enterocolitica IP97; 4, Morganella morganii GUI-1; 5, O. anthropi SLO74; 6, P. aeruginosa PAO01; 7, Providencia stuartii VDG 96. Identical amino acids are indicated by an asterisk. The predicted helix-turn-helix motif (HTH) of the Lys-R family is indicated by arrows.
