…two groups of researchers have taken a different approach, using a system that puts the genes into chromosomes, but allows them to subsequently be removed.
Rather than using viruses, the researchers instead turned to a “transposable element” known as piggyBac. Originally found in insects, piggyBac is a parasitic stretch of DNA that can move around the genome, cutting and pasting itself into a chromosome where the genetic sequence reads “TTAA”.
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