https://dc.etsu.edu/etsu-works/18532/
"Retrons, msDNA, and the Bacterial Genome" by B. C. Lampson, M. Inouye et al.
Retrons are distinct DNA sequences that code for a reverse transcriptase (RT) similar to the RTs produced by retroviruses and other types of retroelements....
bacterial genomeretronsmsdnalampsoninouye