BIOB11H3 Lecture Notes - Lecture 9: Galactose, Repressor, Operon
Document Summary
Lecture 9: gene regulation i: promoters & control circuits. When inducer is added to culture, mrna for beta-galactosidase is produced. >enzyme appears after a minute of mrna production start. Removal of inducer makes mrna production drop rapidly. >enzyme amount levels off since no more mrna. Set of genes being transcribed controlled by operator gene. in this case, when lactose (lac) is present, the repressor is bound to lac & inactivated. When lac conc. is high, 3 enzymes encoded by lac operon to digest lactose is transcribed & translated.
