[Isolation and characteristics of compound transposons Tn1000::Tn5].


Two types of compound transposons were derived. In the first case, transposon Tn5 is inserted into the gene responsible for Tn1000 transposase synthesis. In the other, Tn5 is inserted into the region near the left end of Tn1000, where no functionally significant genes were found. It is known that translocation of the compound transposons does not depend on their size and takes place with the efficiency close to that characteristic of the intact Tn1000. Insertion of Tn5 into the gene coding for Tn1000 transposase results in sharp decrease in the efficiency of Tn1000 translocations. This effect, however, may be eliminated by introduction into the cell of the intact Tn1000.


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