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. 2021 Aug 19;13(16):4161. doi: 10.3390/cancers13164161

Figure 3.

Figure 3

Biogenesis and functions of circRNAs. circRNA is produced by back-splicing and the fragments of RNA form a closed circular nucleotide structure connected by covalent bond. circRNAs interact with RNA binding protein (RBP), sponge with miRNAs and compete with mRNAs, leading to regulation of gene expression and protein translation.