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The aligning maps of the sequences of VC1345 gene and the schematic diagram of the primers used in the function analysis of the 15bp gap of the VC1345 gene of the O139 pigment producing V. cholerae strains. A. Mutation of the strain 3182 compared to other strains. B. Mutation of the O139 pigment producing strains. Two dashed boxes up the VC1345 gene sequence showed the short direct repeat at the deletion breakpoint.
