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Start Over You searched for: Creator Skaar, Palmer David ✖ Remove constraint Creator: Skaar, Palmer David Creator Lederberg, Joshua ✖ Remove constraint Creator: Lederberg, Joshua Subject Escherichia coli ✖ Remove constraint Subject: Escherichia coli Subject Multifactorial Inheritance ✖ Remove constraint Subject: Multifactorial Inheritance Subject Mutation ✖ Remove constraint Subject: Mutation 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