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Analysis of vacA and cagA PCR products from HCC samples. The 352-bp and 297-bp fragments were analyzed by 1.5% agarose gel electrophoresis. Lane M: nucleotide marker; lane 1: positive control (cagA DNA); lane 2: positive control (vacA DNA); Lanes 3, 4: cagA positive samples; lane 5: negative control (double-distilled water).
