[The genetic regulatory systems of cointegrative plasmid transfer in E. coli K-12 cells]

On the basis of transfer factor pAP42 and nonconjugative plasmids pRSF2124 and pUB781, the cointegrative plasmids pAP42/pRSF2124 and pAP42/pUB781 were constructed. Complex systems of plasmid transfer inhibition (funU and finV) were detected in the structure of cointegrative plasmids.