I was going to say you can't get very far without a protein vehicle, but then I remembered that's quite incorrect: https://en.wikipedia.org/wiki/Retrotransposo

I was going to say you can't get very far without a protein vehicle, but then I remembered that's quite incorrect: https://en.wikipedia.org/wiki/Retrotransposon https://en.wikipedia.org/wiki/Retrotransposon The injection is important, however, as it gets the genetic material past a whole lot of nucleases that cover your epithelia.