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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/GL000220.1:156073-156075-113406-113408-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156075-113408 42667.0 Human
5_8S_rRNA::intergenic/GL000220.1:156074-156074-112020-112020-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156074-112020 44054.0 Human
5_8S_rRNA::intergenic/GL000220.1:156075-156075-109253-109253-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156075-109253 46822.0 Human
5_8S_rRNA::intergenic/GL000220.1:156075-156075-109359-109359-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156075-109359 46716.0 Human
5_8S_rRNA::intergenic/GL000220.1:156075-156075-150556-150556-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156075-150556 5519.0 Human
5_8S_rRNA::intergenic/GL000220.1:156075-156077-115918-115920-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156077-115920 40157.0 Human
5_8S_rRNA::intergenic/GL000220.1:156076-156077-109087-109088-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156077-109088 46989.0 Human
5_8S_rRNA::intergenic/GL000220.1:156076-156077-113384-113385-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156077-113385 42692.0 Human
5_8S_rRNA::intergenic/GL000220.1:156076-156079-110528-110531-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156078-110530 45548.0 Human
5_8S_rRNA::intergenic/GL000220.1:156077-156078-109859-109860-+/+ 5_8S_rRNA::intergenic rRNA +/+ intergenic GL000220.1:156078-109860 46218.0 Human