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Genes and Proteins

Discussion of all aspects of biological molecules, biochemical processes and laboratory procedures in the field.

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Genes and Proteins

Postby josieall@aol.com » Sun Nov 27, 2005 5:13 pm

HELP..... NONCODING SEQUENCES are called what???????
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Postby MrMistery » Sun Nov 27, 2005 5:25 pm

Are you reffering to introns? Or gene regulators in bacteria operons?
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Postby Thisisanfield » Thu Dec 01, 2005 10:19 am

The only ones I know are introns. Non-coding sequences I think are the strand of Introns together after fragments of introns have been separated from the exons. I rad about in New Scientist awhile ago that the introns actually might have a function. I don't clearly remember what this time, but I will try to find it.
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Postby hurly » Thu Dec 01, 2005 4:45 pm

Can somebody update me with the introns? I know they code for something, but can't remember what...
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Postby Poison » Thu Dec 01, 2005 7:32 pm

They are the non-coding part which is removed before translation. They are between exons, the coding parts.
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Postby sdekivit » Fri Dec 02, 2005 7:24 am

apart from introns and exons, there are also 3' and 5' untranslated regions: UTRs
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Postby victor » Fri Dec 02, 2005 11:40 am

Ok...I think I know them but get confused because of those glossary...
can you explain to me what are intron, exon, etc???
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Postby sdekivit » Fri Dec 02, 2005 3:18 pm

introns are pieces of RNA that are spliced out --> non-coding DNA and exons are translated to proteins.

due to leaky scanning and poly adenylation there's a small region at the 5' and 3' end that is untranslated.
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Postby Jelanen » Fri Dec 02, 2005 3:26 pm

Introns- INtervening sequences. Thats how I always keep the bloody things defined in my all to addled brain. Its important to note that defining introns and exons are protein specific. Frame shifting or alternate initiation sites may change what is an intron and what is an exon. And yes, I'm still here.

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Postby swimmer » Wed Dec 14, 2005 9:52 pm

Thisisanfield wrote:The only ones I know are introns. Non-coding sequences I think are the strand of Introns together after fragments of introns have been separated from the exons. I rad about in New Scientist awhile ago that the introns actually might have a function. I don't clearly remember what this time, but I will try to find it.


an example of a function of intron sequences is..the retrotrasposons(LINES,SINES..)..am I completely wrong?they should have among others the capability to autocleave themselves and transfer and integrate in another site.
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The Role of Introns

Postby Jumpshooter » Thu Dec 15, 2005 3:48 pm

*Yeah, pretty much like all the members have said: Introns are non-coding DNA in the chromosomes. Their main role is as a Structural support to keep the DNA phsyically stabilized--sorta like scaffolding. You use it to support you while cleaning your gutter or painting your home. Introns are structural stabilizers; Exons are coding regions that direct the formation of physiologically important proteins.
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