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Applied and Environmental Microbiology, March 2004, p. 1843-1846, Vol. 70, No. 3
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.3.1843-1846.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.

Reappraisal of the Regulation of Lactococcal L-Lactate Dehydrogenase

Ed W. J. van Niel,* Johan Palmfeldt, Rani Martin, Marco Paese, and Bärbel Hahn-Hägerdal

Department of Applied Microbiology, Lund University, Lund SE-221 00, Sweden

Received 4 September 2003/ Accepted 25 November 2003

Lactococcal lactate dehydrogenases (LDHs) are coregulated at the substrate level by at least two mechanisms: the fructose-1,6-biphosphate/phosphate ratio and the NADH/NAD ratio. Among the Lactococcus lactis species, there are strains that are predominantly regulated by the first mechanism (e.g., strain 65.1) or by the second mechanism (e.g., strain NCDO 2118). A more complete model of the kinetics of the regulation of lactococcal LDH is discussed.

* Corresponding author. Mailing address: Department of Applied Microbiology, Lund University, P.O. Box 124, Lund SE-221 00, Sweden. Phone: 46 46 222 0619. Fax: 46 46 222 4203. E-mail: ed.van_niel{at}tmb.lth.se.

Applied and Environmental Microbiology, March 2004, p. 1843-1846, Vol. 70, No. 3
0099-2240/04/$08.00+0     DOI: 10.1128/AEM.70.3.1843-1846.2004
Copyright © 2004, American Society for Microbiology. All Rights Reserved.



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Copyright © 2004 by the American Society for Microbiology. All rights reserved.