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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/21:8256861-8256862-8214782-8214783-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256862-8214783 42079.0 Human
5_8S_rRNA::intergenic/21:8256861-8256862-8215288-8215289-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256862-8215289 41573.0 Human
5_8S_rRNA::intergenic/21:8256861-8256862-8254097-8254098-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256862-8254098 2764.0 Human
5_8S_rRNA::intergenic/21:8256862-8209954-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256862-8209954 46908.0 Human
5_8S_rRNA::intergenic/21:8256862-8256862-8209783-8209783-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256862-8209783 47079.0 Human
5_8S_rRNA::intergenic/21:8256872-8256873-8215374-8215375-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256873-8215375 41498.0 Human
5_8S_rRNA::intergenic/21:8256917-8256919-8210231-8210233-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256917-8210231 46686.0 Human
5_8S_rRNA::intergenic/21:8256925-8256930-8212543-8212548-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256925-8212543 44382.0 Human
5_8S_rRNA::intergenic/21:8256925-8256930-8255189-8255194-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256925-8255189 1736.0 Human
5_8S_rRNA::intergenic/21:8256927-8256930-8212962-8212965-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic 21:8256927-8212962 43965.0 Human