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Inactive repressor

Inactive repressor

a repressor that cannot combine with an operator gene until it has combined with a corepressor (usually a product of a protein pathway); after activation, the repressor arrests production of the proteins controlled by the operator gene; a homeostatic mechanism for regulation of repressible enzyme systems.

Synonym: aporepressor.

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Re: IBO 2003 questions- please help me out

... galactoside-transacetylase. Lac operon is under the control of LacI (repressor), which is inactive in the presence of lactose (inductor). There is a wide diversity of the chemical lactose ...

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by tittu
Mon May 12, 2008 2:41 pm
Forum: Cell Biology
Topic: IBO 2003 questions- please help me out
Replies: 9
Views: 11202

Questions regarding lac/trp operons

... units of B-gal. Since the first strand of the merodiploid contains an inactive CAP binding site, CAP-cAMP complex won't be able to bind to the ... we are forced to look only at the second strand which is i-, but enough repressor will be made by i+ on the other strand so this will be repressed ...

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by operon
Thu Mar 08, 2007 7:32 pm
Forum: Molecular Biology
Topic: Questions regarding lac/trp operons
Replies: 2
Views: 5304

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