Table 3 Classification of gene models into different groups based on their relative location to other genes, number of isoforms and other criteria
| Â | Name | Description |
|---|---|---|
Group 1 | Uni-exon transcripts | Transcripts having a single exon and no introns |
Group 2 | Transcripts without UTRs | Transcripts missing either the 5′ or the 3′ UTR sequence |
Group 3 | Transcripts with UTRs | Transcripts having both UTRs |
Group 4 | Transcripts with micro-exons | Transcripts where at least one exon has length less than 50 nucleotides |
Group 5 | Transcripts with long introns | Transcripts where at least one intron has a length greater than 10,000Â bp |
Group 6 | Closely placed transcripts on same strand | Transcripts on the same strand having less than 250 nucleotides between each other |
Group 7 | Closely placed transcripts on opposite strand | Transcripts on the opposite strands having less than 250 nucleotides between each other |
Group 8 | Multi transcript gene | Transcripts of a gene that have multiple transcripts |
Group 9 | Single transcript gene | Transcripts of a gene that have single transcript |