From: Retrocopy contributions to the evolution of the human genome
Type of event | Parent gene contribution | Count | Percentage |
---|---|---|---|
Type I – Exon acquisition (host gene modified by retrocopy) | New 5' exon (UTR and/or N-terminal protein coding) | 10 | 1% |
 | New 3' exon (UTR and/or C-terminal protein coding) | 18 | 2% |
 | New internal exon | 6 | 1% |
Type II – duplication (no host gene involved) | Single exon | 624 | 86% |
 | Exons/introns generated, post insertion | 55 | 8% |
Type III – novel genes (no host gene involved) | Antisense, majority of ORF out-of-frame wrt to parent, and other cases (e.g., from non-genic regions) | 13 | 2% |
Total | Â | 726 | Â |