- Post transcriptional changes to mRNA
- ''capping ends'' prevents enzyme attack
- RNA splicing carried out by enzyme 'spliceosomers'
- Removal of introns and some exons sometimes by these enzyme complexes
- Proves than one gene can code for more than one protein.
- The post transcriptional changes change the polypeptide sequence.
- What is pre mRNA? Mostly nonsense introns instead of useful exons