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Fragments of the cspL promoter region were fused to the gusA reporter and reintroduced into Lactobacillus plantarum cells, either on multicopy plasmids or through single-copy chromosomal integration. beta-Glucuronidase activity and primer extension data demonstrate that the cspL promoter is induced in response to cold shock and that multicopy constructs quench the induction of the resident cspL gene.
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Derzelle et al. (2002) studied this question.
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