Chez Charles/ biblio/ Mammalian NUMT insertion is non-random. Edit RecentChanges History Preferences Branchable Nucleic Acids Res. 2012 Jul 3. Tsuji J, Frith MC, Tomii K, Horton P. Mammalian NUMT insertion is non-random. ‘NUMTs tend to insert near retrotransposons, but with no preference for the orientation of the retrotransposon. NUMTs tend not to insert inside retrotransposons.’