Fig. 2

Four examples of mitochondrial tRNAs and their tRFs in T. cancriformis. Secondary structures of four mature mitochondrial tRNAs are shown on the left. Nucleotide sequence alignments of each tRNA and its tRFs are shown in the center. Total read counts of each tRF in the six developmental stages are shown (the three most numerous of the tRF variants are indicated with arrows and Roman numerals i–iii). On the right, the main tRF regions in each parental tRNA are shown with a bold line. AC stem–loop region (anticodon stem–loop region). See Additional file 1: Figure S4 for another 12 examples of mitochondrial tRNAs and their tRFs in T. cancriformi