Table 1.

Summary of all retrons whose production of msDNA has been experimentally validated. The new systematic nomenclature is described in the main text. In parenthesis, we also include the names initially developed in (23). The 16 shaded entries, referred to as the ‘experimentally validated retrons’, contain fully annotated and experimentally-validated msr-msd-RT cassettes listed in the National Center for Biotechnology Information (NCBI) databank (accessed August 2019). The 22 remaining entries contain elements that have been experimentally demonstrated to produce msDNA but do not correspond to fully annotated or validated entries in the NCBI databank