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. 1992 Aug;174(16):5475–5478. doi: 10.1128/jb.174.16.5475-5478.1992

The amount of RepR protein determines the copy number of plasmid pIP501 in Bacillus subtilis.

S Brantl 1, D Behnke 1
PMCID: PMC206391  PMID: 1644777

Abstract

To prove the hypothesis that the amount of RepR protein is the rate-limiting factor for replication of plasmid pIP501 in Bacillus subtilis, the repR gene was placed under control of the inducible promoter pspac. The plasmid copy number of the pIP501 derivative pRS9 could be deliberately adjusted between approximately 1 and 50 to 100 molecules per cell by varying the concentration of the inducer isopropyl-beta-D-thiogalactopyranoside. Construction of a repR-lacZ fusion proved that the increase in copy number was due to a proportional increase in the amount of RepR protein.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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