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Species: Human
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circRNA ID Gene Gene Type Strand (circRNA/Gene)
circRNA Type i

The back-fusion junctions (BFJs) of circRNAs from genic regions may have three possible positions relative to the nearest exon-intron boundaries of their cognate linear transcripts, giving rise to three circRNA subtypes:

(1) canonical (or completely boundary) circRNAs with both BFJs aligning to exon-intron boundaries;

(2) half interior (or half boundary) circRNAs with one, but not both, of the BFJs aligning to exon-intron boundaries;

(3) complete interior (or non-boundary) circRNAs with both junctions appearing inside of exons or introns.

Lariats are byproducts of splicing and can be regarded as variants of canonical circRNAs; for clarity, we list lariats separately here.

Intergenic circRNAs, derived from intergenic regions that often encode poorly annotated noncoding transcripts, can be considered a new distinct subtype of their own.

We collectively refer to complete interior, half interior, and intergenic circRNAs as noncanonical circRNAs (nc-circRNAs) to distinguish them from canonical circRNAs (c-circRNAs).

CircRNA Types Diagram
Position Length Species
5_8S_rRNA::intergenic/21:8256931-8256934-8212963-8212966-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256934-8212966 43968.0 Human
5_8S_rRNA::intergenic/21:8256933-8256935-8212564-8212566-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256933-8212564 44369.0 Human
5_8S_rRNA::intergenic/21:8256934-8212966-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256934-8212966 43968.0 Human
5_8S_rRNA::intergenic/GL000220.1:156042-114248-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156042-114248 41794.0 Human
5_8S_rRNA::intergenic/GL000220.1:156059-156059-154477-154477-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156059-154477 1582.0 Human
5_8S_rRNA::intergenic/GL000220.1:156061-156067-155826-155832-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156061-155826 235.0 Human
5_8S_rRNA::intergenic/GL000220.1:156062-156067-110923-110928-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156062-110923 45139.0 Human
5_8S_rRNA::intergenic/GL000220.1:156072-156073-153611-153612-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156072-153611 2461.0 Human
5_8S_rRNA::intergenic/GL000220.1:156072-156075-114356-114359-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156072-114356 41716.0 Human
5_8S_rRNA::intergenic/GL000220.1:156073-156073-115078-115078-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156073-115078 40995.0 Human