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Figure 1: Plasmid profile of experimental bacteria. E. coli V517, plasmid size marker (54.4, 7.3, 5.6, 4.0, 2.7 and 2.1 Kb); S. flexneri 24570, plasmid size marker (159.6, 4.0 and 3.0 Kb); S. typhi strain ST10, plasmid-free; S. typhimurium strain SR-11 carrying a 100 Kb virulence plasmid; S. typhi strain ST8 carrying a 150-Kb plasmid-pRST98

Figure 1: Plasmid profile of experimental bacteria. <i>E. coli</i> V517, plasmid size marker (54.4, 7.3, 5.6, 4.0, 2.7 and 2.1 Kb); <i>S</i>. <i>flexneri</i> 24570, plasmid size marker (159.6, 4.0 and 3.0 Kb); <i>S. typhi</i> strain ST<sub>10</sub>, plasmid-free; <i>S. typhimurium</i> strain SR-11 carrying a 100 Kb virulence plasmid; <i>S. typhi</i> strain ST<sub>8</sub> carrying a 150-Kb plasmid-pR<sub>ST98</sub>