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. 2018 May 23;4(7):FSO314. doi: 10.4155/fsoa-2018-0036

Figure 1. . Regulatory functions of different types of circular RNAs.

Figure 1. 

(A–C) Three types of circular RNAs (circRNAs). (A) EcircRNAs are generated from exons. (B) EIcircRNAs contain both exons and introns. (C) CircRNAs are formed by introns. (D–G) Functions of circRNAs. (D) CircRNAs can act as miRNA sponges. (E) CircRNAs are able to promote transcription. (F) CircRNAs can bind to proteins. (G) CircRNAs encode proteins.

CircRNA: Circular intronic RNA; EcircRNA: Exonic RNA; EIcircRNA: exon–intron RNA.