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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
ABLIM1/10:114436177-114436285--/- ABLIM1 protein_coding -/- partial 10:114436177-114436285 108.0 Human
ABLIM1/10:114465694-114491875--/- ABLIM1 protein_coding -/- interior 10:114465694-114491875 26181.0 Human
ABR/17:1125183-1125184-1125368-1125369--/- ABR protein_coding -/- canonical (exon-exon) 17:1125183-1125368 185.0 Human
ABT1/6:26598945-26598949-26598436-26598440-+/+ ABT1 protein_coding +/+ interior 6:26598949-26598440 509.0 Human
ACACA/17:37085194-37085198-37085424-37085428--/- ACACA protein_coding -/- interior 17:37085194-37085424 230.0 Human
ACADM/1:75787553-75787554-75787230-75787231-+/+ ACADM protein_coding +/+ interior 1:75787554-75787231 323.0 Human
ACAP2/3:195277075-195277291--/- ACAP2 protein_coding -/- interior 3:195277075-195277291 216.0 Human
ACIN1/14:23058670-23058677-23058921-23058928--/- ACIN1 protein_coding -/- interior 14:23058677-23058928 251.0 Human
ACIN1/14:23059239-23059243-23059441-23059445--/- ACIN1 protein_coding -/- interior 14:23059243-23059445 202.0 Human
ACIN1/14:23059308-23059314-23059431-23059437--/- ACIN1 protein_coding -/- interior 14:23059308-23059431 123.0 Human