AP BIOLOGYLac Operon Regulation
Explore prokaryotic gene regulation through the lac operon in E. coli, a classic model of negative and positive control. Visualize how the repressor protein blocks transcription in the absence of lactose, and how lactose (allolactose) acts as an inducer to allow transcription of genes encoding β-galactosidase, permease, and transacetylase. Understand CAP-cAMP positive regulation under low glucose conditions.
