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Results of the gel electrophoresis for identification of m1a and s1a genotypes of the H. pylori strains of milk and meat samples. Lanes 3 and 4: positive controls, 5: negative control, M: 100 bp DNA ladder (Fermentas, Germany), and numbers 1-2: positive samples for m1a (290 bp) and s1a (213 bp) alleles, respectively.
