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Nature 217, 825-827 (2 March 1968) | doi:10.1038/217825a0; Received 12 February 1968

New Controlling Element in the Lac Operon of E. coli

KARIN IPPEN*, JEFFREY H. MILLER, JOHN SCAIFE† & JONATHAN BECKWITH

  1. Department of Bacteriology and Immunology, Harvard Medical School, Boston, Massachusetts
  2. *Harold C. Ernst Research Fellow.
  3. †On leave from MRC Microbial Genetics Research Unit, London.
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The lac promoter maps between the represser i gene and the operator o gene, so that the operator gene is probably transcribed.