![Large, elongated purple molecule has an on/off switch on it pointed to on.](https://www.embl.org/news/wp-content/uploads/2022/07/Retrons_Final_v2-300x180.jpg)
The retron switch
EMBL researchers now understand the function of an elusive small DNA in bacteria and have developed a tool that can be used to better understand what might ‘switch on’ bacterial immune defences.
SCIENCE & TECHNOLOGY2022
sciencescience-technology