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. 2021 Apr 27;18(2):240–253. doi: 10.1080/15548627.2021.1917131

Figure 1.

Figure 1.

The biological characteristics and functions of circRNAs. (A) Intron pairing-derived cyclization. (B) Lasso-derived cyclization. (C) RNA binding proteins regulate circRNAs formation. (D) circRNAs adsorption of miRNA as a molecular sponge, playing the role of ceRNA. (E) circRNAs direct binding to mRNA. (F) circRNAs binding to proteins. (G) circRNAs binding to transcription factors. (H) circRNAs encoding small peptides.