| Qualifier | circular_RNA |
| Definition | indicates that exons are out-of-order or overlapping because this spliced RNA product is a circular RNA (circRNA) created by backsplicing, for example when a downstream exon in the gene is located 5’ of an upstream exon in the RNA product |
| Value Format | none |
| Example | /circular_RNA |
| Comment | should be used on features such as CDS, mRNA, tRNA and other features that are produced as a result of a backsplicing event. This qualifier should be used only when the splice event is indicated in the "join" operator, eg join(101627..101652,102190..102421,73380..73493) |