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 ATACACGTGCACGGATAACGCTCA AGCGGTATCCAGCCGATGTTTTC TTTCCCGGCTGCAACTACGGTAAGCGGTATCCAGCCGATGTTTTCAATACTGCATTTGAATACACGTGCACGGATAACGCTCATTGTTTTTCGCATGC 4 3 3' arm Caenorhabditis_elegans mirbase mir-248 1e-49 crm-mir-248 0.000000000005 -29.6 .......(((((((..(((((.((((.(((((.((((.(((.(((((........))))).))))).))..))))).)))).)))))..)).))).)) (-29.60)