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Periodical. Ogawa, Tohru, Tania A. Baker, Arie Van der Ende, and Arthur Kornberg. "Initiation of Enzymatic Replication at the Origin of the Escherichia coli Chromosome: Contributions of RNA Polymerase and Primase." Proceedings of the National Academy of Sciences of the United States of America 82, (June 1985): 3562-3566. Article. 5 Images.. Proceedings of the National Academy of Sciences of the United States of America