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Start Over You searched for: Language English ✖ Remove constraint Language: English Format Text ✖ Remove constraint Format: Text 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 Story Section Defining the Genetic Coding Problem, 1954-1957 ✖ Remove constraint Story Section: Defining the Genetic Coding Problem, 1954-1957