So what we have to use is something called an axonuclease. So we take our restriction enzyme and in step one we basically add the restriction enzyme that also cleaves on this side and this side. And so at the end, we basically produce the following linear DNA molecule. And on both ends we basically contain those green sections that we want to remove. So in the next step, we add a molecule we call an exonuclease. And what an exonuclease does is it essentially removes these tiny portions at the end.