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Representative locations of strain CH014 O91:H21-specific fragments on the E. coli EDL933 O157:H7 strain genome map. Open squares show the distribution of the 23 major EDL933-specific sequences compared to the E. coli K-12 genome that are missing in CH014. Filled squares show the distribution of the 10 additional CH014-specific sequences in the EDL933-specific regions. The size of each block is proportional to the size of the corresponding island described by Perna et al. (32).
