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Start Over You searched for: Language English ✖ Remove constraint Language: English Subject Escherichia coli ✖ Remove constraint Subject: Escherichia coli Subject Crossing Over, Genetic ✖ Remove constraint Subject: Crossing Over, Genetic Genre Articles ✖ Remove constraint Genre: Articles Periodical Proceedings of the National Academy of Sciences of the United States of America ✖ Remove constraint Periodical: Proceedings of the National Academy of Sciences of the United States of America