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Locations of the PCR products obtained with the primer pairs used in this work and listed in Table 1 (based on the sequence of the pO157 plasmid of strain EDL933 [GenBank accession no. AF074613]). A, toxB.911F/toxB.1468R (30); B, toxB 5′int; C, toxB 3′int; D, toxB 5′ probe; E, toxB 3′ probe.
