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Sequence of the mcr-1 cassette. The 2,600-bp-long sequence is shown, with the start and stop codons of mcr-1 being in bold. The sense of transcription of mcr-1 is indicated by an arrow. Amino acids of the MCR-1 sequence are indicated below the nucleotide sequence. The P1-mcr-1 promoter sequences are indicated, with the corresponding −35 and −10 boxes being underlined, as well as the +1 transcription start.
