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Repressor gene

repressor gene

A gene that prevents a nonallele from being transcribed.


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Determine whether gene lac I and lac O is functioning?

... with lactose , with IPTG. ONPG is used in all sample to determine the beta galactosidase. I know that both lactose and IPTG can associate with lac repressor and cause expression. If the result of these three treatment only with IPTG appears yellow, can you deduce lac I and lac O which is functioning ...

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by eos
Fri May 09, 2014 11:57 am
 
Forum: General Discussion
Topic: Determine whether gene lac I and lac O is functioning?
Replies: 0
Views: 594

mRNA transcripts, cis/trans-acting questions

... to metabolize galactose. All of the mutants fail to transcribe the GAL2 gene, which encodes the enzyme for the first step in metabolizing galactose. ... d. probably a loss-of-function mutation in the gene encoding a repressor to the operon?

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by animus31
Fri Nov 09, 2012 11:58 am
 
Forum: Genetics
Topic: mRNA transcripts, cis/trans-acting questions
Replies: 0
Views: 2090

Re:

... can explain anything of how we came about. All evidence points toward gene loss over time. There is NO evidence of totally new genes appearing ... it's evident that new phenotypes most often evolve due to loss of some repressor gene and not due to appearance of some new gene. So, in my opinion, ...

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by Cat
Sun Oct 07, 2012 3:25 pm
 
Forum: Evolution
Topic: the genetic code as proof of common ancestor
Replies: 9
Views: 4516

Re: Increasing Information For Genetic Algorithm

... population, those that survive establish new race, etc. The latest genetic data from experiments suggests that genes accumulate loss of function ... new phenotypes result from loss of function in some gene (usually a repressor) and not due to acquisition of new genetic information...

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by Cat
Sun Sep 09, 2012 5:20 pm
 
Forum: Evolution
Topic: Increasing Information For Genetic Algorithm
Replies: 8
Views: 12677

Gene enhancers/repressors in Drosophilia stripes

... that I can't seem to answer correctly/articulate in the right way. Gene expresses 2 stripes, 1 in the anterior and 1 in the posterior. The same ... enhancers might specify the 2 stripes. You may use the activity of a repressor. You may modulate the affinity or number of binding sites (but ...

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by bwooten28
Wed Apr 04, 2012 4:44 am
 
Forum: Molecular Biology
Topic: Gene enhancers/repressors in Drosophilia stripes
Replies: 1
Views: 1087
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