Fig. 1From: Emerging role of a novel small non-coding regulatory RNA: tRNA-derived small RNAThe structure of tRNA and classification of tsRNAs. a The schematic diagram of the secondary structure of tRNA. b The types of tsRNAs: 1-tRF(cleaved by RNase Z in the 3′ trailer of ribosomal RNA precursor), 2-tRF(generated by unknown ribonuclease), 3-tRFs and 5-tRFs, 5′ tiRNA and 3′ tiRNA are cleaved from the anticodon loopBack to article page