"45% of the human genome is made of repeated DNA, and some types can be mobilized within the genome (mobile DNA). LINE-1 or L1 is the only autonomous active mobile DNA within the human genome, with 500.000 copies per haploid genome (~17% of the genome). Overall, L1 is responsible for ~30% of our genome. Due to its activity and number in the genome, the impact that L1 has and have on the genome is ...