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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/21:8256859-8256859-8218615-8218615-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256859-8218615 38244.0 Human
5_8S_rRNA::intergenic/21:8256859-8256860-8214604-8214605-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256860-8214605 42255.0 Human
5_8S_rRNA::intergenic/21:8256859-8256860-8254102-8254103-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256860-8254103 2757.0 Human
5_8S_rRNA::intergenic/21:8256860-8256860-8253984-8253984-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256860-8253984 2876.0 Human
5_8S_rRNA::intergenic/21:8256860-8256860-8254657-8254657-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256860-8254657 2203.0 Human
5_8S_rRNA::intergenic/21:8256860-8256861-8209787-8209788-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256860-8209787 47073.0 Human
5_8S_rRNA::intergenic/21:8256860-8256863-8218417-8218420-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256863-8218420 38443.0 Human
5_8S_rRNA::intergenic/21:8256861-8256861-8254745-8254745-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256861-8254745 2116.0 Human
5_8S_rRNA::intergenic/21:8256861-8256862-8209642-8209643-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256862-8209643 47219.0 Human
5_8S_rRNA::intergenic/21:8256861-8256862-8214696-8214697-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256861-8214696 42165.0 Human