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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/KI270733.1:174035-174035-134796-134796-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174035-134796 39239.0 Human
5_8S_rRNA::intergenic/KI270733.1:174035-174036-126093-126094-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174035-126093 47942.0 Human
5_8S_rRNA::intergenic/KI270733.1:174035-174037-133891-133893-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174036-133892 40144.0 Human
5_8S_rRNA::intergenic/KI270733.1:174036-174037-130385-130386-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174037-130386 43651.0 Human
5_8S_rRNA::intergenic/KI270733.1:174036-174037-131103-131104-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174037-131104 42933.0 Human
5_8S_rRNA::intergenic/KI270733.1:174036-174037-131105-131106-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174037-131106 42931.0 Human
5_8S_rRNA::intergenic/KI270733.1:174036-174037-133425-133426-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174037-133426 40611.0 Human
5_8S_rRNA::intergenic/KI270733.1:174036-174037-135080-135081-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174037-135081 38956.0 Human
5_8S_rRNA::intergenic/KI270733.1:174036-174038-171047-171049-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174038-171049 2989.0 Human
5_8S_rRNA::intergenic/KI270733.1:174038-174038-172087-172087-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic KI270733.1:174038-172087 1951.0 Human