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Periodical. Maki, Hisaji, and Arthur Kornberg. "Proofreading by DNA Polymerase III of Escherichia coli Depends on Cooperative Interaction of the Polymerase and Exonuclease Subunits." Proceedings of the National Academy of Sciences of the United States of America 84, (July 1987): 4389-4392. Article. 4 Images.. Proceedings of the National Academy of Sciences of the United States of America