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. 2021 Mar 27;6(2):70–79. doi: 10.1016/j.ncrna.2021.03.002

Fig. 4.

Fig. 4

The biogenesis of circular RNAs. Most circular RNAs are generated from protein-coding genes via back-splicing by which a splicing donor is joined to an upstream acceptor. In other cases, circular RNAs are derived from lariat intronic RNAs that escape from debranching.