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Table 3 Classification of gene models into different groups based on their relative location to other genes, number of isoforms and other criteria

From: FINDER: an automated software package to annotate eukaryotic genes from RNA-Seq data and associated protein sequences

  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 10,000 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