Circular RNAs (circRNAs) are a class of single-stranded, non-coding RNAs which form a covalently closed loop. It was first reported as viroids in plants and was later detected in human cells in 1979. In a circular RNA molecule, unlike a linear RNA, the 5' and 3' ends have been joined together. The unique loop structure of circRNAs provides them with a longer half-life and more resistance to...