The sequence similarity histogram of homologous tRNAs in the human and mouse genomes. The X-axis is the sequence similarity. The Y-axis is the number of homologous tRNA pairs. The sequences are obtained from the tRNA family in the Rfam  database. For each human tRNA, we report the highest sequence similarity.
Sun et al. BMC Bioinformatics 2012 13(Suppl 3):S12 doi:10.1186/1471-2105-13-S3-S12