Mechanisms for intron splicing
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- Splicing always involves two events :
- Phosphodiester bonds at the exon-intron boundaries are broken.
- A new phosphodiester bond is formed between the 3'-end of the upstream exon and the 5'-end of the downstream exon.
- Several different mechanisms exist for doing this :
- Nuclear pre-mRNA or spliceosomal introns.
- tRNA introns.
- Self-splicing introns : Group I and Group II introns.
Last modified: Tue Feb 10 11:20:25 CET 2004