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 AACGGCGGCAATTTGTTTACAG GTAAGCAAATTCCCGTCATTTTC GTAAGCAAATTCCCGTCATTTTCTGGAAATATTTTGAAACGGCGGCAATTTGTTTACAG 4 1 3' arm Caenorhabditis_elegans mirbase 100 100 -20.7 (((((((((((.(((((..((((..((....))..)))).))))).))))))))))).. (-20.70)