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Helicobacter-specific primers used for the amplification of rpoB DNAs (458 bp). They were selected from the rpoB sequences of B. subtilis and E. coli and H. pylori 26695 (GenBank accession no. AE000625) and H. pylori J99 (accession no. AE001540). *, H. pylori-specific Tru9I restriction sites on the amplified rpoB DNA corresponding to codons 432, 441, and 487.
