text: DNA editing proteins edit and permanently change gene sequence, and subsequently the gene expression of the cell. All progenies of the cell will inherit the edited gene sequence. DNA editing proteins often take part in the immune response system of both prokaryotes and eukaryotes, providing high variance in gene expression in adaptation to various pathogens.
  Specific examples include:
  * RAG1/RAG2
  * TdT
  * Cas1/Cas2