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Comparative genomic organization of the tcd pathogenicity island in the different Photorhabdus strains W14, TT01, and Hb. Note that despite the presence of local deletions and insertions, W14 and TT01 share all of the tc genes within the tcd locus, whereas strain Hb lacks a tcdA4-like gene, as predicted by the array. The positions of other genes discussed in the text are indicated. Sequences are from GenBank accession no. AY144119 and World Intellectual Property 02/094867 and 99/42589.
