Lac and TRP Operons

Lac and TRP Operons - allolactose. Trp operon is a negative...

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Ashley Monie Biology 303.101 30 November 2010 Homework Assignment (lac operon and trp operon) Lac operon is an example of a negative inducible operon, which controls the transcription of three genes needed in lactose metabolism; which are, lacZ, lacY and lacA. Each gene encodes a certain enzyme. lacZ gene encodes B-Galactosidase, lacY encodes permease, and lacA encodes transacetylase. Its transcription is allowed by the presence of
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Unformatted text preview: allolactose. Trp operon is a negative repressible operon that controls the biosynthesis of tryptophan. Transcription is normally turned on and must be repressed. The binding of tryptophan to the repressor renders the repressor active accomplishing repression. RNA polymerase from transcribing structural genes is prevented by the active repressor, which binds to the operator....
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This note was uploaded on 12/05/2010 for the course BIOL 303 taught by Professor Nyaga during the Spring '10 term at Morgan.

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