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. 2023 Aug 16;42(38):2783–2800. doi: 10.1038/s41388-023-02780-w

Fig. 3. Mechanisms leading to the biogenesis of circRNAs.

Fig. 3

Three main mechanisms of back-splicing, such as lariat-driven circularization (exon skipping) (A), intron pairing-driven circularization (B), and RNA binding protein (RBP)‐driven circularization (C) lead to the biogenesis of circRNAs. Alternative processes (D) can also lead to the biogenesis of other special classes of circRNAs, including intergenic circRNAs or rt-circRNAs and f-circRNAs, which are frequently associated with pathological conditions. Created with BioRender.com.