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 ...
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 ...
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