Exon
At the organizations Eucaryote S, the let us exons are the transcribed parts of the Gène S which code Protéine S. Let us exons represent also the sequences located in 5 ' and 3 ' not translated.
In a general way, the genes consist of a continuation of exons and of alternate Intron S. For example: Exon1 - Intron1 - Exon2 - Intron2 - Exon3 -… the great majority of the genes eucaryotes have will introns; however, some are made up only of one exon. The system of intron exon does not exist at the Procaryote S.
After the transcription, ARN synthesized will undergo a certain number of modifications, of which the épissage, during which exons will be “joined up” and the Intron S excized of the ARN, in order to give the mature ARN used for the proteinic translation in complex.
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