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(A) PCR targeting the 3′ end variable regions of the cagA gene that encodes the EPIYA motifs. The amplicon sizes varied due to the variable number of EPIYA motifs and the spacer regions. (B) Different types of CagA types and their prevalence in Trivandrum. The nucleotide sequences (GenBank accession numbers MN968513 to MN968550) of the cagA genes were converted to the amino acid sequences and analyzed.
