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We have isolated mutants deleted for different segments of the sulA-ompA region of the Escherichia coli K-12 chromosome using gene fusion techniques. Genetic and physical analysis showed that the deletions ranged from 500 to more than 4000 base pairs (bp) Strains were found in which all, or part, of the sulA and ompA genes had been deleted.
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Bremer et al. (1986) studied this question.
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