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Tandem T7-like promoters in Salmonella genomes and genome organization of the islands Ty2 and CT18. (A) and (B) Sequence walkers (21) of tandem T7-like promoters in the islands Ty2 and CT18. The repeat A3 is a shortened copy of repeats A1 and A2 (Figure 2A-2). (C) Genome organization and comparison of the islands Ty2 and CT18. Symbol key is given in Figure 4.
