While Jacob, Monod, and others previously showed that lactose metabolites containing galactose residues activated the lac operon, the true inducer remained elusive. 11–13 Then, in 1972, a team ...

Last week I finally addressed promoters and gave a bit of background on the lac operon. Looking back, I feel that I didn't give the topic of operons adequate treatment. They are a very crucial aspect ...

How do bacteria avoid wasteful production of unnecessary proteins when their genes are always on? The answer lies in regulating the operon. As trp levels increase, trp binds to trpR, causing a ...