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Start Over You searched for: Creator Lederberg, Joshua Remove constraint Creator: Lederberg, Joshua 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

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