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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
ABR/17:1062893-1062911-1062512-1062530-+/- ABR protein_coding +/- antisense 17:1062911-1062530 381.0 Human
ABR/17:1063852-1063865-1064704-1064717--/- ABR protein_coding -/- interior 17:1063852-1064704 852.0 Human
ACACB/12:109191675-109191680-109185672-109185677-+/+ ACACB protein_coding +/+ interior 12:109191675-109185672 6003.0 Human
ACACB/12:109209350-109209353-109206589-109206592-+/+ ACACB protein_coding +/+ partial 12:109209350-109206589 2761.0 Human
ACACB/12:109246336-109246342-109246180-109246186-+/+ ACACB protein_coding +/+ partial 12:109246342-109246186 156.0 Human
ACACB/12:109267724-109267728-109267389-109267393-+/+ ACACB protein_coding +/+ interior 12:109267724-109267389 335.0 Human
ACADVL/17:7220259-7220262-7220040-7220043-+/+ ACADVL protein_coding +/+ interior 17:7220259-7220040 219.0 Human
ACBD3/1:226186434-226186439-226186553-226186558--/- ACBD3 protein_coding -/- interior 1:226186439-226186558 119.0 Human
ACER2/9:19424838-19424839-19423858-19423859-+/+ ACER2 protein_coding +/+ interior 9:19424838-19423858 980.0 Human
ACSL1/4:184756374-184756379-184760421-184760426--/- ACSL1 protein_coding -/- interior 4:184756379-184760426 4047.0 Human