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Applied and Environmental Microbiology, December 1999, p. 5590-5593, Vol. 65, No. 12
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.

Involvement of Manganese in Conversion of Phenylalanine to Benzaldehyde by Lactic Acid Bacteria

Masja N. Nierop Groot* and Jan A. M. de Bont

Wageningen Centre for Food Sciences, Division of Industrial Microbiology, Department of Food Technology and Nutritional Sciences, Wageningen University, Wageningen, The Netherlands

Received 31 March 1999/Accepted 1 September 1999

We examined the involvement of Mn(II) in the conversion of phenylalanine to benzaldehyde in cell extracts of lactic acid bacteria. Experiments performed with Lactobacillus plantarum demonstrated that Mn(II), present at high levels in this strain, is involved in benzaldehyde formation by catalyzing the conversion of phenylpyruvic acid. Experiments performed with various lactic acid bacterial strains belonging to different genera revealed that benzaldehyde formation in a strain was related to a high Mn(II) level.

* Corresponding author. Mailing address: Wageningen Centre for Food Sciences, Division of Industrial Microbiology, Department of Food Technology and Nutritional Sciences, Wageningen University, P.O. Box 8129, 6700 EV Wageningen, The Netherlands. Phone: 31 317 483393. Fax: 31 317 484978. E-mail: Masja.Nierop-Groot{at}imb.ftns.wau.nl.

Applied and Environmental Microbiology, December 1999, p. 5590-5593, Vol. 65, No. 12
0099-2240/99/$04.00+0
Copyright © 1999, American Society for Microbiology. All rights reserved.


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