Let me share with you a difference between Exons and Introns.
| Aspect | Exons | Introns |
| Introduction | · Exons are found in the coding region of genes. · These are present in the mature mRNA transcript. |
· Introns are found in the non-coding region of genes.
· These are removed during RNA processing, not present in the mature mRNA. |
| Function | These regions code for amino acids, forming the protein-coding sequences. | These regions do not code for any amino acids; they are non-coding sequences. |
| Sequence consistency | More conserved across related species. | Less conserved and may vary between species. |
| Size | Generally shorter in size as compared to introns. | Generally longer in size as compared to exons. |
| Origin | Thought to have originated from the duplication of existing sequences. | Thought to have originated from the insertion of non-coding sequences. |
| Regulatory regions | Exons may contain regulatory regions that influence gene expression. | Introns generally do not contain regulatory regions related to gene expression. |
| Splicing Signals | Exon-intron boundaries have specific splicing signals (splice sites). | Introns contain splicing signals for proper removal during RNA processing. |