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Results of amplification of the prtH2 (A) and prtH (B) genes of 16 strains of L. helveticus. PCR products were obtained with the PrtH2-for-3/PrtH2-rev-2 (A) and PrtH-for-1/PrtH-rev-1 (B) primers and separated on a 2% (wt/vol) agarose gel in TBE 1x at 100 V for 45 min. The O'RangeRuler 100-bp DNA ladder was used as a molecular weight marker.
