FIG 3.

(a) Comparison of the sequences of qacA4 (GenBank accession number MK040360), a reference qacA sequence (GenBank accession number AB566410), and a reference qacB sequence (GenBank accession number AF053772). The associated AluI restriction sites are shown below the nucleotide (nt) sequences, and the corresponding amino acid sequences are displayed in the boxes above the nucleotide sequences. (b) Structure of the predicted efflux pump encoded by qacA4 (adapted from reference 20 with permission). The residues which distinguish QacA4 from the reference QacA sequence are highlighted in red. Those which distinguish QacA from QacB are displayed in blue.