Molecular evolution of the Escherichia coli chromosome. VI. Two regions of high effective recombination.

Abstract excerpt

Two 6- to 8-min regions, centered respectively near 45 min (O-antigen region) and 99 min (restriction-modification region) on the Escherichia coli chromosome, display unusually high variability among 11 otherwise very similar strains. This variation, revealed by restriction fragment length polymorphism (RFLP) and nucleotide sequence comparisons, appears to be due to a great local increase in the retention...

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