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The nucleotide sequences of ampR-ampC genes and their deduced amino acid sequences. The putative promoter regions are indicated by −10 and −35, and the nucleic Lys-R motif is indicated by T-N11-A. The consensus sites of class C β-lactamases are boxed, and the predicted helixes of AmpR helix-turn-helix motif are in bold. The double arrow in the ampR gene sequence indicates the site of cloning in recombinant plasmid pCF01BA1-3.
