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Polymorphic nucleotide sites in the wzz gene (nt 19236 to 20387) and the wzz-gsk intergenic region in various serotypes of Y. pseudotuberculosis and in Y. pestis EV76 when compared to the serotype O:1b sequence (bottom line). Identical nucleotides to the O:1b sequence are indicated by a period and those differing from this sequence by their letter code. Nucleotide positions in vertical format are noted above the polymorphisms.
