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 TGAGAATGGTAACCAATACA AGTTGGGTATCCACTCTTGCA TGAGTTGGGTATCCACTCTTGCAATGAACAAATGTGAGAATGGTAACCAATACA 8 1 3' arm Ciona_intestinalis mirbase 100 100 -15.7 .(.(((((....(((.(((..((.(.....).))..))).)))...))))).). (-15.70)