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 TTAGTAGGCGTTGTGGGAAGGG CTTTTCACACACCTCACTAACA GAATTGTTCCGATCGCCGCTCTTTTCACACACCTCACTAACACTGACCACCGATGCATAGATGTTAGTAGGCGTTGTGGGAAGGGCGGCGACAGTGAACGTCGTTTC 3 2 3' arm Caenorhabditis_elegans mirbase mir-253 1e-50 crm-mir-253 1e-22 -47.9 ((...(((((..(((((((((((..(((((.(((.((((((((((..((....))..))).)))))))))).).))))..)))))))))))..).)))).))..... (-47.90)