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Size and sequence diversity in the cagY MRR of unrelated H. pylori isolates. PCR was performed using 26695 primers FRRF and FRRR that flank the FRR, or using primers MRRF and MRRR that flank the MRR, and products resolved on a 1% agarose gel. The variation in these 12 strains is representative of studies of a global collection of 62 unrelated H. pylori strains.
