The complete nucleotide sequence of the gene encoding the Salmonella t
yphimurium methyl viologen-resistant protein, SmvA, similar to QacA (r
esistance to quaternary ammonium ion) of Staphylococcus aureus, and th
e surrounding sequences were determined. This indicated that the gene
arrangement of S. typhimurium is different from that of Escherichia co
li in this region.