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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
ACSL1/4:184756701-184756702-184757031-184757032--/- ACSL1 protein_coding -/- interior 4:184756702-184757032 330.0 Human
ACSL1/4:184756744-184756744-184757046-184757046--/- ACSL1 protein_coding -/- interior 4:184756744-184757046 302.0 Human
ACSL1/4:184756842-184756846-184757149-184757153--/- ACSL1 protein_coding -/- interior 4:184756842-184757149 307.0 Human
ACTA2/10:88935088-88935091-88935200-88935203--/- ACTA2 protein_coding -/- interior 10:88935091-88935203 112.0 Human
ACTA2/10:88935097-88935101-88935234-88935238--/- ACTA2 protein_coding -/- interior 10:88935097-88935234 137.0 Human
ACTA2/10:88935098-88935098-88935237-88935237--/- ACTA2 protein_coding -/- interior 10:88935098-88935237 139.0 Human
ACTA2/10:88936348-88936349-88936909-88936910--/- ACTA2 protein_coding -/- interior 10:88936349-88936910 561.0 Human
ACTA2/10:88938066-88938069-88938225-88938228--/- ACTA2 protein_coding -/- interior 10:88938066-88938225 159.0 Human
ACTA2/10:88941265-88941269-88943858-88943862--/- ACTA2 protein_coding -/- interior 10:88941265-88943858 2593.0 Human
ACTA2/10:88947411-88947412-88948799-88948800--/- ACTA2 protein_coding -/- interior 10:88947412-88948800 1388.0 Human