mature_miRNA miRNA* pre-miRNA EST_contig mismatches bulges arm species source_database RFAM_best_hit RFAM_lowest_evalue miRBase_best_hit miRBase_lowest_evalue folding_energy secondary_structure ACAGTAGTCTGCACATTGGGTG CACCTGCAGCAACTTTGC TTGATAGGACTTGATGTGGCGGTAAAGGATACACCTGCAGCAACTTTGCGGCACTTCGGCATACGACAGTAGTCTGCACATTGGGTGTCTAGCTGCTACATG 3 6 3' arm Ciona_intestinalis mirbase 100 100 -32.8 .............((((((((((...((((((.((((((((.(((...((...(....)....))..))).).)))))....)))))))).)))))))))). (-32.80)