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 TAGCAGCACACAAAACTATC TGGTTTCTGTGAGCTGCTT TAGCAGCACACAAAACTATCATTTTCTAATTTGCTGGTTTCTGTGAGCTGCTT 3 1 5' arm Ciona_intestinalis mirbase 100 cin-mir-15 3e-24 -18.7 .((((((.((((((((((.((..........)).)))))).)))).)))))). (-18.70)