Transposons Shifting Segments of the Genome

Transposons, also called transposable elements, are mobile genetic elements that generally have only modest target site selectively and can thus insert themselves into many different DNA sites. In transposition, a specific enzyme, usually encoded by the transposon and called a transpose, acts on a specific DNA sequence at each end of the transposon (first disconnecting it from the flanking DNA) and the inserting it into a new target DNA site. There is no requirement for homology between the ends of the element and the insertion site.

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