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Journal of Bacteriology, December 2007, p. 8746-8749, Vol. 189, No. 23
0021-9193/07/$08.00+0 doi:10.1128/JB.01368-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
Escherichia coli Physiology in Luria-Bertani Broth
Guennadi Sezonov,*
Danièle Joseleau-Petit, and
Richard D'Ari
Institut Jacques Monod, CNRS, Université Paris 6, Université Paris 7, F-75251 Paris Cedex 05, France
Received 22 August 2007/
Accepted 14 September 2007
Luria-Bertani broth supports Escherichia coli growth to an optical density at 600 nm (OD600) of 7. Surprisingly, however, steady-state growth ceases at an OD600 of 0.3, when the growth rate slows down and cell mass decreases. Growth stops for lack of a utilizable carbon source. The carbon sources for E. coli in Luria-Bertani broth are catabolizable amino acids, not sugars.
* Corresponding author. Present address: Unité Biologie Moléculaire du Gène chez les Extrémophiles, Institut Pasteur, 25, rue du Docteur Roux, F-75724 Paris Cedex 15, France. Phone: 331 4061 3722. Fax: 331 4568 8834. E-mail:
sezonov{at}pasteur.fr
Published ahead of print on 28 September 2007.
Journal of Bacteriology, December 2007, p. 8746-8749, Vol. 189, No. 23
0021-9193/07/$08.00+0 doi:10.1128/JB.01368-07
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
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