Abstract
The cat reporter gene was used to assess expression of two promoters, previously strongly expressed in Escherichia coli, in Brevibacterium sp. R312 strain. The tac promoter (de Boer et al., 1983, Proc. Natl. Acad. Sci. USA 80, 21-25) was poorly expressed in Brevibacterium sp. In contrast, the AatII- SalI fragment of plasmid pYEJ001 (Pharmacia LKB Biotechnology, Sweden) containing two lac operators, a consensus sequence promoter and the cat structural gene clearly revealed chloramphenicol acetyltransferase activity and the presence of a 25,600-kDa protein, corresponding to the monomeric CAT protein, in cell extracts.
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