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. 2019 Sep 23;10:297. doi: 10.1186/s13287-019-1411-x

Fig. 1.

Fig. 1

Noncoding RNA classification and functions. a The classification of noncoding RNAs based on their functions and length. b Regulatory mechanism of microRNAs. c Regulatory mechanism of long noncoding RNAs. rRNAs, ribosomal RNAs; tRNAs, transfer RNAs; snoRNAs, small nucleolar RNAs; snRNAs, small nuclear RNAs; tmRNAs, transfer messenger RNAs; gRNAs, guide RNAs; ncRNAs, noncoding RNAs; miRNAs, microRNAs; piRNAs, PIWI-interacting RNAs; siRNAs, small interfering RNAs; lncRNAs, long noncoding RNAs