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Tissue: breast epithelium
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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
ACTB/7:5527195-5527195-5527468-5527468--/- ACTB protein_coding -/- interior 7:5527195-5527468 273.0 Human
ACTB/7:5527464-5527469-5527604-5527609--/- ACTB protein_coding -/- interior 7:5527469-5527609 140.0 Human
ACTB/7:5527529-5527536-5529122-5529129--/- ACTB protein_coding -/- partial 7:5527536-5529129 1593.0 Human
ACTB/7:5527644-5527644-5527818-5527818--/- ACTB protein_coding -/- interior 7:5527644-5527818 174.0 Human
ACTB/7:5527676-5527682-5528067-5528073--/- ACTB protein_coding -/- interior 7:5527676-5528067 391.0 Human
ACTB/7:5528008-5528009-5528348-5528349--/- ACTB protein_coding -/- interior 7:5528009-5528349 340.0 Human
ACTB/7:5528009-5528011-5528358-5528360--/- ACTB protein_coding -/- partial 7:5528011-5528360 349.0 Human
ACTB/7:5528034-5528040-5528576-5528582--/- ACTB protein_coding -/- interior 7:5528034-5528576 542.0 Human
ACTB/7:5528359-5528362-5528545-5528548--/- ACTB protein_coding -/- interior 7:5528359-5528545 186.0 Human
ACTB/7:5528494-5528500-5529651-5529657--/- ACTB protein_coding -/- interior 7:5528500-5529657 1157.0 Human