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Lactococcus lactis subsp. lactis biovar diacetylactis strains are used in the dairy industry for generating acetoin and notably diacetyl which imparts a high level of buttery flavor notes.A collection of domesticated and environmental strains was screened for the production of diacetyl or acetoin (D/A), and citrate fermentation. Unexpectedly, both domesticated and environmental strains produced D/A...
The lysogeny region of the Lactobacillus delbrueckii bacteriophage mv4 contains two divergently oriented ORFs coding for the Rep (221 aa) and Tec (64 aa) proteins. The transcription of these two genes was analysed by primer extension and Northern blot experiments on lysogenic strains. The location of the transcription initiation sites of rep and tec in the intergenic region allowed the identification...
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