Initially the genes are transferred to agrobacteria, increasingly used in genetic engineering because they can transferDNA between themselves and plants.
The 2010 National Medal Science to Jacqueline K. Barton, California Institute of Technology, for discovery of a new property of the DNA helix long-range electron transfer, and for showing that electron transfer depends upon stacking of the base pairs and DNA dynamics.
Unsupported claims that the 35S promoter is unstable, prone to transfer and insertion into the DNA of other cells, thereby causing cancer in humans, have been extensively rebutted by the scientific community and are without merit.