introns

Splicing (genetics)

...sequences known as exons (expressed codons) and introns (interrupting codons). In contrast to prokaryote...nscript called pre-mRNA that is composed of both introns and exons (see transcription ). Pre-mRNA has to be spliced before it can be translated into prot...

Spliceosome

...ny protein subunits, that remove the non-coding introns from unprocessed mRNA .The mRNA of prokaryotes ...native splicing (the re-combination of different introns ) is a major source of genetic diversity in eukaryotes.For example alternative splicing is what ...

Intron

...d into protein but which are now discarded. Some introns such as Group I and Group II introns are actually ribozymes that are capable of catalyzing their own splicing out of the primary RNA ...

Gene

...gmented internally by non-coding sequences called introns , which can be many times longer than the genes th...f a gene, by keeping the exons and removing the introns . So, the DNA strand needs to be in an exon to be expressed. Because of the complexity of the spli...

Enhancer

...he start site. Enhancers can also be found inside introns . An enhancer's orientation may even be reversed without affecting its function. Furthermore, an enhancer may be excised and inserted elsewhere in the chromosome, and still affect gene transcription....

Alternative splicing

...n transcribed from the DNA , it includes several introns and exons . In nematodes , the mean is 4-5 exon...e fruit fly Drosophila there are more than 100 introns and exons in one transcribed pre-mRNA. But what is an intron and what is an exon is not decided yet....