Metabolic flux in glucose/citrate co-fermentation by lactic acid bacteria as measured by isotopic ratio analysis.
FEMS Microbiol Lett
; 182(2): 207-11, 2000 Jan 15.
Article
em En
| MEDLINE
| ID: mdl-10620667
ABSTRACT
The flux of carbon into lactic acid, diacetyl and acetoin during the co-metabolism of glucose and citrate by Lactococcus lactis subsp. lactis biovar. diacetylactis has been determined using natural abundance isotopic ratio analysis. During fermentation in the conditions used (glucose, 27.8 mM; citric acid, 13.9 mM; initial pH 6.2-6.4, anaerobic) it is shown that approximately 65% of the carbon source used for the aroma compounds is derived from the carbohydrate. Equally, citrate contributes approximately 30% of the carbon recovered in lactic acid. Thus, there is no evidence for a metabolic separation of the catabolism of these two carbon sources.
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Base de dados:
MEDLINE
Assunto principal:
Lactococcus lactis
/
Ácido Cítrico
/
Ácido Láctico
/
Glucose
Idioma:
En
Ano de publicação:
2000
Tipo de documento:
Article