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Tissue: K562
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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
ABCF1/6:30591050-30591052-30590855-30590857-+/+ ABCF1 protein_coding +/+ interior 6:30591052-30590857 195.0 Human
ABCF1/6:30591053-30591055-30590858-30590860-+/+ ABCF1 protein_coding +/+ interior 6:30591055-30590860 195.0 Human
ABCF1/6:30591324-30591329-30591156-30591161-+/+ ABCF1 protein_coding +/+ lariat 6:30591324-30591156 168.0 Human
ABCF2/7:151213587-151213589-151223815-151223817--/- ABCF2 protein_coding -/- interior 7:151213589-151223817 10228.0 Human
ABCF2/7:151213809-151213811-151213938-151213940--/- ABCF2 protein_coding -/- interior 7:151213809-151213938 129.0 Human
ABCG1/21:42293202-42293207-42292614-42292619-+/+ ABCG1 protein_coding +/+ interior 21:42293207-42292619 588.0 Human
ABCG1/21:42293609-42293613-42293465-42293469-+/+ ABCG1 protein_coding +/+ interior 21:42293609-42293465 144.0 Human
ABCG1/21:42296575-42296575-42296195-42296195-+/+ ABCG1 protein_coding +/+ interior 21:42296575-42296195 380.0 Human
ABHD14B/3:51968861-51968865-51969092-51969096--/- ABHD14B protein_coding -/- interior 3:51968861-51969092 231.0 Human
ABHD17A/19:1881622-1881490-+/- ABHD17A protein_coding +/- antisense 19:1881622-1881490 132.0 Human