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Dictionary » E » Exon

Exon

Definition

noun, plural: exons

(molecular biology)

1. The protein-coding region in the DNA.

2. The nucleic acid sequence in the DNA, or RNA transcript following genetic splicing.


Supplement

Genes contain exons which are regions coding for proteins and which are interrupted by the unused sequences called introns. Exons have been found to include both sequences coding for amino acids and untranslated sequences. The introns are removed and the exons are joined together to form the final functional mRNA.


Related forms: exonic (adjective).
Compare: intron.
See also: DNA, RNA, translation, mRNA, protein synthesis.

User Contributions / Comments:

  • The base sequences that appear in eukaryotic DNA and are used to make mRNA for a specific protein are the exons of a gene.

(~Dlee7283)


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Results from our forum


Re:

that would suggest there is some small alternative-intron in your exon, which can be thus split why are you using primers only for one exon at a time? Is your aim to clone all variants or are you fine with only some? Well, we initially had 4 sets of primers. ...

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by polkadotshorts
Mon Dec 10, 2012 7:12 pm
 
Forum: Genetics
Topic: How to clone a gene with lots of splicing intermediates?
Replies: 6
Views: 881

How to clone a gene with lots of splicing intermediates?

that would suggest there is some small alternative-intron in your exon, which can be thus split why are you using primers only for one exon at a time? Is your aim to clone all variants or are you fine with only some?

See entire post
by JackBean
Mon Dec 10, 2012 6:10 pm
 
Forum: Genetics
Topic: How to clone a gene with lots of splicing intermediates?
Replies: 6
Views: 881

Re:

... could help me out! I am finding it all very difficult; Each lane in the gel has cDNA that has been amplified with a set of primers that cut out an exon from the ligase 6 gene - so each lane should have one exon in it - however some lanes have 2 bands when they should theoretically have 1. I don't ...

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by polkadotshorts
Sat Dec 08, 2012 3:52 pm
 
Forum: Genetics
Topic: How to clone a gene with lots of splicing intermediates?
Replies: 6
Views: 881

Load DNA PCR Product into Agarose Gel

mmmm, I think yes because I did a PCR for particular reagion by adding a specific primer (exon) before sequencing .

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by 9afa
Mon Nov 12, 2012 10:58 am
 
Forum: Molecular Biology
Topic: Load DNA PCR Product into Agarose Gel
Replies: 10
Views: 1166

question on genotype

My guess would be, that the 1 in the end means first exon which is deleted, hence Δ. And yes, they probably write it twice because the yeast is diploid.

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by JackBean
Mon Sep 10, 2012 12:08 am
 
Forum: Microbiology
Topic: question on genotype
Replies: 1
Views: 1569
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