Editing Repeated sequence (DNA) (section)

===Intrachromosomal recombination===

[[Homologous recombination]] between chromosomal repeated sequences in somatic cells of ''[[Nicotiana tabacum]]'' was found to be increased by exposure to [[mitomycin C]], a bifunctional alkylating agent that [[crosslinking of DNA|crosslinks DNA]] strands.<ref name = Lebel1993>{{cite journal |vauthors=Lebel EG, Masson J, Bogucki A, Paszkowski J |title=Stress-induced intrachromosomal recombination in plant somatic cells |journal=Proc Natl Acad Sci U S A |volume=90 |issue=2 |pages=422–6 |date=January 1993 |pmid=11607349 |pmc=45674 |doi=10.1073/pnas.90.2.422 |doi-access=free |bibcode=1993PNAS...90..422L }}</ref>  This increase in recombination was attributed to increased intrachromosomal recombinational repair.<ref name = Lebel1993/>  By this process, mitomycin C damaged DNA in one sequence is repaired using intact information from the other repeated sequence.