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Plasmid profiles of serovar Typhimurium O:4,12 isolates from wild-living birds in Norway. The six plasmid profiles detected are shown in lanes 1 to 6. The size markers in lane 7 are standard plasmids (from top to bottom, 62.0, 35.8, 4.8, 3.4, 2.0, and 1.4 MDa).
