by Christoph — If you've ever come across the topic of 'gene reg­u­la­tion in bac­te­ria' in your bi­ol­ogy classes at high school, col­lege or uni­ver­sity, you've in­evitably learned about a clas­sic: the lac operon of E. coli. Well, this it's not an exam here! Just ask your­self what you re­mem­ber with­out the help of an AI.