Table 1. The primers used for the PCR-based amplification of sequences from the rdxA, frxA and 23S-rRNA genes of Helicobacter pylori.

		Amplicon size
Gene	Primer sequences	(bp)	Reference
rdxA	5′-GTTAGGGATTTTATTGTAATG-3′	427	Kwon et al. (2001)
	3′-ACGCCAAGCATTTGAGCAAA-5′
frxA	5′-TCTCAAGCGGAAAAATCCGG-3′	445	Kwon et al. (2001)
	3′-AATTTTTGATGATTTGAGCG-5′
23S-rRNA	5′-ACGGCGGCCGTAACTATA-3′	307	Wang et al. (2001)
	5′-ACAGGCCAGTTAGCTA-3′