Figure 4.

Subcelluar circRNA classification based on the two back-splicing positions (start and end) in the genome. (a) CircRNA classification according to the start and end genomic positions (five types: exonic, intronic, atypical exonic, overlap and intergenic types). The red and blue boxes represent the circRNAs and corresponding parental genes, respectively. (b) The proportions of five types of circRNA expressed in the six subcellular fractions. Each type of circRNA is represented by the indicated color box.