Intron
At the organizations Eucaryote S, the Gène S which code Protéine S consist of a continuation of Exon S and of will introns (as in intrusive ) alternate. For example: Exon1 - Intron1 - Exon2 - Intron2 - Exon3 -…
After the transcription, ARN synthesized will undergo a certain number of modifications, whose épissage, during which will introns will be excized of ARN. The Exon S will be as for them “joined up” to give ARN by the mechanism of épissage. One will thus obtain a ARN of the type Exon1 - Exon2 - Exon3 -…
Will introns thus do not play any part in becoming to it ARN (translation in Protéine for ARNm, in Ribosome for ARNr, translation ARNt…), so that their functions are not very to date well defined. Their most important role is, for what it is possible to observe to date, to allow combinative at the time of the épissage. That makes it possible the Gène S with ARN m to especially code several Protéine S, which represents an energy saving for the cell, when the transcription is done high frequency.
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