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Res Microbiol. 1994 Oct;145(8):579-83.

New shuttle vector for cloning in Bacillus stearothermophilus.

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Department of Genetics and Microbiology A. Buzzati Traverso, University of Pavia, Italy.


Cloning vector plasmid pRP9 was constructed on the basis of the broad host-range plasmid pLM6. pRP9 was a small plasmid (2.9 kb), possessed a convenient polyrestriction site sequence and efficiently transformed Bacillus subtilis, Bacillus stearothermophilus and Escherichia coli. Furthermore, pRP9 presented a very high segregational stability in Bacillus hosts. Also, the structural stability in Bacillus strains, grown under selective pressure, of pRP9 carrying a 3-kb fragment, was high. No single-stranded and high-molecular weight pRP9 DNA was found in B. stearothermophilus. The host/vector systems described possessed all the properties required for efficient gene cloning.

[Indexed for MEDLINE]

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