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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Citrate utilization in milk by Leuconostoc cremoris and Streptococcus diacetilactis.

Citrate utilization and diacetyl, acetoin and acetaldehyde production by 2 strains each of Leuconostoc cremoris and Streptococcus diacetilactis in milk were studied. With the leuconostoc bacteria no growth and little citrate utilization occurred unless a stimulant (yeast extract) was present, when complete utilization of citrate without concomitant production of diacetyl or acetoin was obtained. The additon of Mn2+ stimulated growth resulted in diacetyl and acetoin production. Destruction of diacetyl and acetoin occurred when the citric acid level fell to c.1000 and 600 mug/g in the case of Leuc. cremoris FR8-1 and CAF1, respectively. Only strain FR8-1 produced acetaldehyde. In contrast, Str. diacetilactis produced diacetyl, acetoin and acetaldehyde concomitant with citrate utilization.[1]

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